Malicious PDF — malware analysis report

Static analysis result for SHA-256 878347994fc75906…

MALICIOUS

PDF

77.2 KB Created: 2021-03-01 12:51:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f228f6282d704bf267918ff6b6c9c840 SHA-1: 2311b1b8465e218b20d984138979c7230e30ae5b SHA-256: 878347994fc75906de812d63faeb91261f801ab14e6137b3c65a7aada1b7740f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to link farms hosted on disposable domains, indicating a likely attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting a tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=craftsman+garage+door+opener+replacement+motor PDF link annotation
    • http://juxisuzuvu.iblogger.org/xozuxinomopigad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5ffffc9bb64fa.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/Vif6B07/28975548279.pdfIn PDF document text
    • https://cdn.sqhk.co/filodomazora/hdn0KsO/ralphs_ad_next_week.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/gghjjbO/84899972137.pdfIn PDF document text
    • https://cdn.sqhk.co/mumeriretepi/hAXhaji/luwad.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/ghRif0X/toggle_on_off_switch_circuit.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/MgdJLjc/zombie_army_trilogy_sniper_elite_difficulty.pdfIn PDF document text
    • http://jumuzonogajal.iblogger.org/50595244566.pdfIn PDF document text
    • http://tajezedireg.iblogger.org/jeep_wrangler_service_cost_uk.pdfIn PDF document text
    • https://simejozegedofu.weebly.com/uploads/1/3/4/3/134359486/b4ebb4.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/1773041.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367297/normal_5ff7d4526f10a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370767/normal_60053de7ad2bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403131/normal_6038ed6361311.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/16741756671.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/voxoxizawinasiji.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/ascendant_2017_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/xudebizopujakopekipodef.pdfIn PDF document text
    • http://rajunuximu.epizy.com/63778162634.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE55 5380 bytes
SHA-256: 69b00b25fa7a39d5ef9b90dbbf5c5a7862bee503ef61043b86ba4177d199d090
font_01_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 11328 bytes
SHA-256: c061a1b7d116762d8ea9f0e9e17635e93cf95f47983f34dd36580f2fcaafb4df

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