Malicious PDF — malware analysis report

Static analysis result for SHA-256 116e7007428d3ed7…

MALICIOUS

PDF

69.4 KB Created: 2021-05-03 23:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9a1746752cbe02b938a4da40a2d0d97e SHA-1: b0618347f06e0e84fc6ca42087bf47fead3a5cbb SHA-256: 116e7007428d3ed7a26d5642154cb165771c1c01ddb4bc4c8d0fcfddd87e38d4
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=will+cyberpunk+2077+be+on+ps5+reddit PDF link annotation
    • http://blockingscenery.com/which_finger_should_you_use_for_a_pulse_oximeter6tdf3.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/3nFKNjc/xizerikodalu.pdfIn PDF document text
    • https://cdn.sqhk.co/nunologen/whep7hg/8067808905.pdfIn PDF document text
    • https://cdn.sqhk.co/mujutuzidip/gggchbJ/elder_scrolls_blades_creature_weaknesses.pdfIn PDF document text
    • http://jobauthor.online/2674270632613ka3.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/ezXY7Ee/skyrim_dragon_language_alphabet_translation.pdfIn PDF document text
    • http://mnogolidov.xyz/hypixel_skyblock_talisman_reforge_spreadsheetbyscb.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/jjeogcy/marketing_plan_pitch_deck_examples.pdfIn PDF document text
    • http://keto-menu.online/20471277103ds9fk.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://com-signto5.xyz/baudrillard_booksf7h3v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dugexirawotuv.rf.gd/45363792589.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/how_to_open_aadhar_card_password.pdfIn PDF document text
    • https://0315d410-4255-45a3-9477-873949dd02ac.filesusr.com/ugd/f85006_300eb8ce82614041bf8f7f95fdea154f.pdf?index=trueIn PDF document text
    • http://gidozapufemogig.epizy.com/23559804207.pdfIn PDF document text
    • https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_dfbd5eca5a854041aa80a1994bd88e52.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_f912de73c70a4091a6cf7ef0bf91314e.pdf?index=trueIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_de1261583e8543d69071bb4542174fff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wavunot/92032616100.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD250 5652 bytes
SHA-256: 319236af030d369111a607d799c6b9034bea6d5474f87a4aa6f3428d47670335
font_01_sfnt_off0000e5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BF 10080 bytes
SHA-256: 100958cf231c7ea22391fec4f2063fa9e856b6629e8825f9199f6dcdc52007cb

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