Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ed0e765c4abbbe…

MALICIOUS

PDF

137.4 KB Created: 2021-03-25 06:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 664e6e75a7594a5bd8a87690ed4eb270 SHA-1: 9a1dbb0ac1eaf3b954c1759faeb7e2efefa568f3 SHA-256: d0ed0e765c4abbbe2a0534dc8650bfad72943a8f1859beb8eaa42998c93ea4a9
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7240

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/award?keyword=ibps+clerk+mock+test+free+download+pdf PDF link annotation
    • http://rekusigixebisuk.22web.org/dosisofizigobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375088/normal_5ffbb5667b298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_601152e9822cf.pdfIn PDF document text
    • http://interbankdigital.com/is_the_i5_7200u_goodqfqb7.pdfIn PDF document text
    • http://detonicinitalia.website/zazibanisujasejuzy1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_601327335bcc9.pdfIn PDF document text
    • http://help-ruleviolation.com/78765816615rofl6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_604ede401b1a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427501/normal_5ffa711426fbc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1097e54-3900-487c-bab6-9a70841fcb6a/tom_clancys_ghost_recon_breakpoint_steam_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161b7ac0-f929-452b-97a8-fccf7b4559ff/evenflo_symphony_lx_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39e847c-4e02-4427-a77a-5a09fac9e85c/nuxuxamijig.pdfIn PDF document text
    • https://438c9214-13ba-44a2-8469-a4c97ff43377.filesusr.com/ugd/5d46a0_946e0456dbbe47f690928206fa196c64.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf25118-9d66-4b19-ad37-75edfcf92a70/mepepemuxumimunapade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695d81d3-42e4-4656-80f2-6ba4ce58a712/japaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94eb577f-370d-4614-9325-94d2313e8ebe/28692818509.pdfIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_63f62b0c6fab40d9b7b1b01cbca70a02.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f50986a9-14bc-45f8-a404-1398181517cd/aube_timer_switch_instructions.pdfIn PDF document text
    • http://reforur.rf.gd/word_association_test_book.pdfIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_372f067c548245b58db87b4914587180.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cd5f9c-7dbe-4c31-895a-868c0baca40c/zubajabodatot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92666333-2b3e-4fc6-9bdc-1e9437ac65ce/what_happened_in_1900_in_america.pdfIn PDF document text
    • https://67389751-14cc-4ed3-b660-7ef7239e4cc3.filesusr.com/ugd/bb5584_cad4e3d936e44f15974de761483ee3c4.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_2925da99fbac4f22b2eec6b143c7b359.pdf?index=trueIn PDF document text
    • http://tidovikuvam.epizy.com/merit_amharic_english_dictionary.pdfIn PDF document text
    • http://tebubejusudigu.rf.gd/free_games_chess_full_version.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001e0d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1E0D9 20468 bytes
SHA-256: e52828d181d08739c1bf353a0a414be99b0d03322d98d7affc40705311aec615
font_00_sfnt_off00010eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEF 6232 bytes
SHA-256: 007a066dfdb952842603004b84f5f872d53589562cc42ffe450203af58c68832
font_01_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 5536 bytes
SHA-256: d12aa25792d5e373c5c9f374e30aafe4769a1923d5180f8c3e12070bd561c331
font_02_sfnt_off00013723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13723 50428 bytes
SHA-256: 5659fcf207ebf62d1fd9d2ceaa1aa707efe69eac66ccd54edc4f6d7709baaa42
font_03_sfnt_off000193e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193E2 7748 bytes
SHA-256: 1653c23f8852ec0ee23b0b176555df0679efdf698d33d37222c0c81da52d15c7
font_04_sfnt_off0001a962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A962 18808 bytes
SHA-256: 42ac273e9cf4422a14876448d7a5125297c7776b008f78c12af25e60f24b409c
font_06_sfnt_off00020302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20302 4412 bytes
SHA-256: a559c9f828c0600031bb3df1a7720947e529af76e29fa39f501fd4788e653bd5

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