Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c958b630d86b5d…

MALICIOUS

PDF

92.7 KB Created: 2021-03-20 19:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7993538bf5c34f9ae588132f033eda75 SHA-1: 89f8a11cae1d0027ee4c0d2233dcf5a64a026c3d SHA-256: 97c958b630d86b5d57819790bef7a12017d65c4d76b0b423469a3e50e74b4a9f
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dafemum.ru/wix?keyword=raid+shadow+legends+xp+farming+guide PDF link annotation
    • http://joy-todays.online/texebirusiduddblh.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/technics_sl_d20_turntable.pdfIn PDF document text
    • http://intekzafast.online/leverage_role_playing_gameye5zk.pdfIn PDF document text
    • http://eurostore.info/gabelli_gold_fund_fact_sheetjjsnl.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/transformations_of_square_root_functions_worksheet_answers.pdfIn PDF document text
    • http://polfact.site/693789509552tzw5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://1dab3517-3db0-43ff-9fd6-b65b51f65b60.filesusr.com/ugd/565485_3462f6560b4e4aeeae9e182f59b6d0fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c21eaa-786f-4aa3-ba1a-d70d77272b5a/hand_held_food_chopper_pampered_chef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa93853-cfcd-4560-8cae-50f19810f7f6/horngrens_financial__managerial_accounting_the_financial_chapters_plus_myaccountinglab_edition_6th.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53fc2459-1b5e-4fbe-8a4a-b034bf6188f7/20997405551.pdfIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_1183fc114018479790a58fab03591fbd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ad4ecc-e188-48d1-bbbe-3c76efe56df1/lifebook_jon_butcher_12_categories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a086bcf-c168-445a-ac94-d78c868a8ff4/the_drama_of_scripture_act_5_summary.pdfIn PDF document text
    • https://ced6af22-cf5f-4df0-9cd6-2d424634d287.filesusr.com/ugd/3eed2b_f47d1e741715407d878bd393cf084315.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02088da3-ff35-494c-ab35-350d0d303318/more_relevant_than_ever_meaning.pdfIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_bf73c2ec0ca74e7d87ecd106d644b0ab.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_419c975899f84ab08ac887c2245bdea2.pdf?index=trueIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_432a9c37722e40d7914db816694a3bea.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_284e5df605f74557a1504e9c9dd67a7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba82a78-6286-42c8-baee-83e7535990d4/kalolipa.pdfIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_ff5a4bbf4fc54b64a63b80292c81f5d5.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_off00010761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 5424 bytes
SHA-256: 916d806a3e42226d10d06f3111bbc17c4bdd33131792e138327fed7b321b45e0
font_01_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 11832 bytes
SHA-256: 460f63fb8bffa7133bfb085bb5d8f19c432584eaba1b9c19ea48644ccfaeba0a
font_02_sfnt_off000141c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141C1 16176 bytes
SHA-256: 5c0096e07997531578d110f72cc41a4d4d38e64c80441005109e437c93df282f
font_03_sfnt_off000156da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378