Malicious PDF — malware analysis report

Static analysis result for SHA-256 61dc3887ef3d8fc9…

MALICIOUS

PDF

73.1 KB Created: 2021-04-02 13:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e9ad64f2071bf373a6edac18c448ae2a SHA-1: 47b398ae1e196f6bdd70b307a644b3052f5fea0f SHA-256: 61dc3887ef3d8fc943592ee7d0c7affff29552bb57f2f6b263a0c52e657e28e7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it's part of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by identifying the PDF as a link farm on disposable hosting, designed to redirect users to other malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=united+states+constitution+worksheet+answers PDF link annotation
    • http://bbcua.site/35865751008zhrsf.pdfIn PDF document text
    • http://fafijitesulexiz.mygamesonline.org/kevudot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453103/normal_601f7f61e236f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fe993c787304.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5fc5ef544784c.pdfIn PDF document text
    • http://itchia.space/45223314753c0mau.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428062/normal_606538b3f1f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_600faf44b5447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485703/normal_5ffa3fbe2ade2.pdfIn PDF document text
    • http://kino-vezde.ru/mcp61pm-hm_rev_2.2_biospn1gs.pdfIn PDF document text
    • https://cdn.sqhk.co/xawobovuji/dOWAjam/inoxidable_en_ingles.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_5fd0d897a2525.pdfIn PDF document text
    • http://vladmer.ru/sierra_6.5_grendel_reloading_data6ys9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407069/normal_602a352f78f2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_604dacf998468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_60403e0d75fde.pdfIn PDF document text
    • https://cdn.sqhk.co/napoxanu/ukTOagj/15311691655.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5fcf6045821ad.pdfIn PDF document text
    • http://tapasin.sportsontheweb.net/94337807592.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/igjhc5t/guess_the_anime_quizzes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wukevivetarapu.myartsonline.com/how_to_make_your_own_ice_cream_at_home_easy.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/26543987978.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_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 5144 bytes
SHA-256: 7e90033ec11a28b942bbae9d7c732944cc559165fab2388c91f84b539eca2b72
font_01_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 10176 bytes
SHA-256: 5f6910f80732969745c721ffaea04a20d51256b962014acf5bf9839df2be00e0

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