Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfccdd6a1f92cb7f…

MALICIOUS

PDF

110.2 KB Created: 2021-04-07 20:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a14e086362620bad69e748d6f0847a7b SHA-1: de764bc01b054e670c1e6becfc4cbd15763923aa SHA-256: cfccdd6a1f92cb7f3fa368430e66bf36a5255174b30b42c2735f9e0a5131652e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9586

Heuristics 5

  • 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.
  • 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://lozipotod.ru/123?utm_term=auto+shift+manual+definition PDF link annotation
    • http://wimebenese.getenjoyment.net/definition_of_comparative_public_administration.pdfIn PDF document text
    • http://libralab.digital/96453030968279z1.pdfIn PDF document text
    • http://front-glass.website/poweziredomugebigobuyeff5.pdfIn PDF document text
    • http://rumudasejozekes.iblogger.org/how_to_read_stock_market_patterns.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/96896584673.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/idE5hbe/88845757835.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/UgfQTWv/29713475868.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/7Jjbggd/75794092130.pdfIn PDF document text
    • http://gomotejux.iblogger.org/58168628633.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/ggcjg58/modern_combat_4_zero_hour_download_for_pc.pdfIn PDF document text
    • http://prosale.company/oklahoma_cdl_test_truck5stpr.pdfIn PDF document text
    • http://fumigatoff.online/index_of_ebooks_book_chm_zip8q2ue.pdfIn PDF document text
    • http://ruszaimclub.ru/up_the_organization_audiobookx07ik.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/dd661e23-f93d-470e-bc32-e8eeaa5bea42/big_fish_games_apple_tv.pdfIn PDF document text
    • http://nozipegufi.epizy.com/adrenal_cortex_disorders.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d2e48e-ae7a-4c91-a066-e7372927e579/que_enfermedad_causa_moretones_en_el_cuerpo.pdfIn PDF document text
    • http://kuvofefifowojop.epizy.com/28906725806.pdfIn PDF document text
    • http://birifamabaxum.rf.gd/janoriwogukojusegorojer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/105b1514-81b4-4460-b7bb-8fff0be2c5be/85599859343.pdfIn PDF document text
    • http://sitojedakolotil.rf.gd/share_forfeiture_account_in_balance_sheet.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/98706930207.pdfIn PDF document text
    • http://rodexiguv.onlinewebshop.net/netarupukakewikiwobuwibid.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/basic_reading_skills.pdfIn PDF document text
    • http://wigugagekubog.rf.gd/process_heat_transfer_dq_kern_solution_manual.pdfIn PDF document text
    • http://fudedeki.rf.gd/teenage_story_books.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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off00017e0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17E0C 18176 bytes
SHA-256: e43eb858545a4d9b6abacc8c33ec9501d2ae64a4dc3cc092ef357486bb4e7a32
font_00_sfnt_off0000f530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF530 5684 bytes
SHA-256: caeed39893b82969c26dfcac95946a3fad4fbae0765b3ea81aa15456cfe783a6
font_01_sfnt_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 5040 bytes
SHA-256: 77ff703a8895c95d733e5542cfad707ae090ceb5e4e3904aa418a4e9d335886e
font_02_sfnt_off00011a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A03 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_03_sfnt_off0001250a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1250A 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_04_sfnt_off00012fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC0 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_05_sfnt_off0001398b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398B 6640 bytes
SHA-256: c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
font_06_sfnt_off00014b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2A 16896 bytes
SHA-256: 41e441c9031cd1de54e206ead8fcfe74bbb0a866775d5b87b53f0e4e44dd3885
font_08_sfnt_off00019adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ADF 3276 bytes
SHA-256: 333cf0bae5291019b79d77a37696b89786718dc77a0e6f1c7356514a48765311

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