Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1ab66953d75994…

MALICIOUS

PDF

94.0 KB Created: 2021-03-06 17:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd300acbc49b988f8cde77d20af18959 SHA-1: dcd371e4249b8d8a73e20165c7ca1f5030fb03ce SHA-256: bf1ab66953d75994eefcf804f1f3c1042095a20a53ad7cd7e8d846bdbf668641
134 Risk Score

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=mlb+9+innings+19+mod+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490720/normal_601701971bac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454042/normal_5fd8e84ce1992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_601d70beee1e3.pdfIn PDF document text
    • http://goproonly.com/mcdonalds_application_form_2020ys7uy.pdfIn PDF document text
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/taguvatux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5fc90d95500e4.pdfIn PDF document text
    • http://tiboxul.iblogger.org/41465394021.pdfIn PDF document text
    • http://pixxel.life/pilemipovugakusoxe7hj5p.pdfIn PDF document text
    • http://jewivodapujoje.iblogger.org/lenodulelagoluli.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/7f18328a1f3f.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/good_books_on_history_of_islam4y7se.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_5fc75b2bc8264.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/susis_wuberar_wovazalugeb_giwosumebaranub.pdfIn PDF document text
    • http://static-start.top/1949163472pg878.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/gasedowawujatigiurk14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_a9eb884d4bda4c4ca9a260524dd93f30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b68ba185-2043-4300-999a-68dd05f54c66/mulipatebesezanu.pdfIn PDF document text
    • http://newoponaz.rf.gd/what_is_iso_22000_ppt.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_32b4583d23f441ce8e844d2014be3021.pdf?index=trueIn PDF document text
    • http://somolif.rf.gd/kabagivoradagug.pdfIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_d0f8ec32e18d4f4c989c75c8508a2802.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf41624-a71e-4309-b6ec-60b17639f134/best_recipes_for_picky_eaters.pdfIn PDF document text
    • http://jumezezufa.rf.gd/kamupolepipuwuwipatowe.pdfIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_64786d57e3994425a6dc04f90bc700c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d602006-8ebf-4565-b5fb-b03b53671735/xesomupopupukes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c7fcf4-5c7f-4545-b594-8e16c9e56eed/el_coronado_restaurant.pdfIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_db85acb4ac604899bfdab37b02d13e16.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 5588 bytes
SHA-256: 599cb6d6f1f0ed9d886d84e93fececa0ea9d6154a50f6ca2fe8ea62bb48bf3ae
font_01_sfnt_off00011ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA7 5692 bytes
SHA-256: d2fefa3ea1b4ac6800f48b7187c9be17e6f0bd45134c6b1b016d38e7f4dbcb32
font_02_sfnt_off00013017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13017 10472 bytes
SHA-256: 26b776e26f3369cce709c3252a79850ffc0a8b9f6c7e15ac603670b56c61e8dc
font_03_sfnt_off00015451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15451 16060 bytes
SHA-256: df1d2c903cabdf2976887e260da0b25217edeb5ce2b71f315001024534e8e210