Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c62c89d33db1b20…

MALICIOUS

PDF

77.3 KB Created: 2021-03-19 14:15:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2e19c4fd2ffbb522cb56bf777d9683fa SHA-1: 53276a091b1480e477bf0f21db18d704c5398693 SHA-256: 5c62c89d33db1b204d8eaa5a1b66ca48f17b47b985ec27a39c2ae7d05c825240
146 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. It uses a callback-phone (TOAD) lure. 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 0.9991

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/wix?keyword=samsung+tab+s+10.5+battery+drain PDF link annotation
    • http://nebolizixake.iblogger.org/can_i_pair_my_turtle_beach_stealth_600_to_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/KiiNicB/71674253688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481990/normal_603914cbe1625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_600a9899ba1b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_60338466113f0.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/jsjhRhi/do_car_performance_chips_really_work.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446034/normal_60541f68d871b.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/i4ie8ge/red_rose_tattoo_shop_ohio.pdfIn PDF document text
    • http://bulugivuto.iblogger.org/najewixepufasojeke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_60131f6a7fd9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfd6817-1393-4af9-abe8-cd9a54d1f79f/international_finance_jobs_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/86498463134.pdfIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_f8f838ca7771420b8b55f635059a33cb.pdf?index=trueIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_f7d7fd581310400395442e7c7c41a744.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/mogedoxuboretoseta.pdfIn PDF document text
    • http://ropipowewigu.epizy.com/vertical_angles_worksheets_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125cb5b9-f184-4fa9-846d-97d020141dbb/lagamenaxumupabewusiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86b028e8-0156-4638-901b-c828fa017b55/how_to_program_new_directv_remote_to_box.pdfIn PDF document text
    • https://d8ec88ce-93b1-4b83-b294-7016fd5b5063.filesusr.com/ugd/366252_ef3b348460ec454eacce36bed5ec266c.pdf?index=trueIn PDF document text
    • http://buzatagijekoj.rf.gd/new_movies_bollywood_online.pdfIn PDF document text
    • https://de2a8dfc-dc8d-4d62-be3b-f97abdd17bf6.filesusr.com/ugd/c722c2_c4ff7562c92f4fd59cee2d9a795389f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fokapikow/counting_stars_lyrics_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/477b0eb4-6f92-497e-bbf8-7eeef69714e0/raxowi.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/hvac_electrical_symbols_chart.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5808 bytes
SHA-256: a6b4d7f37c0950ba63fc2ce6bafda7fa88ed329c95ef9eb68ae7c32783fe341e
font_01_sfnt_off00010158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10158 11204 bytes
SHA-256: 956d3f485d65aa72205c4098b23646b6fdf4d101bdf4566b39c6db54efb6a85f