Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cfcb08ee72e22be…

MALICIOUS

PDF

76.4 KB Created: 2021-04-02 21:22:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 355b22fc5c6890501e5d539bea887760 SHA-1: dffbc8392f1d7f0d83ac32fc00fd8a69c794563a SHA-256: 2cfcb08ee72e22bea0073cdf26fff31b780a3183f1fc66cd496781b90cfa8c09
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of link farms on disposable hosting, reinforcing the malicious nature of the document's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/123?utm_term=can+you+sort+alphabetically+in+google+sheets PDF link annotation
    • http://saxobupazes.sportsontheweb.net/diabetes_mellitus_and_diabetes_insipidus.pdfIn PDF document text
    • http://lalabomujulimof.mywebcommunity.org/50684241283.pdfIn PDF document text
    • http://rewetuxavix.mypressonline.com/37451039202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451044/normal_600a0f8262c2d.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/69124150395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5ffa9a35b8480.pdfIn PDF document text
    • http://zhigina.ru/george_foreman_electric_grill_temperature_settingsd44dl.pdfIn PDF document text
    • http://rocketdocs.us/685139513811tv0o.pdfIn PDF document text
    • https://lorebigida.weebly.com/uploads/1/3/4/3/134377432/1019250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366040/normal_5ffb8d2171a23.pdfIn PDF document text
    • https://gibotexoruz.weebly.com/uploads/1/3/4/6/134634126/dodapemovive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_602660ef895a5.pdfIn PDF document text
    • https://desujerobum.weebly.com/uploads/1/3/1/0/131070458/sufutegewej-putaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_604f62ea2bb7a.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://1ux.site/87805354906fa6us.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_c4bf3d2eb0b9452db37764e9cd72bb26.pdf?index=trueIn PDF document text
    • https://c7e723d0-7712-45a3-a8dd-8d8935e7c5e2.filesusr.com/ugd/c4f451_d3df81db08264ab68e9dc96c11d43dd5.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_71229c2f7bfa4d3e99a3c99974d0f253.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/jowarimewiragozikuzip.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/macbeth_act_4_scene_3_modern_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/53537088171.pdfIn PDF document text
    • http://malejubu.myartsonline.com/ceramic_processing_rahaman.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/9728537979.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_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 5340 bytes
SHA-256: 2ed72a4ab1297f7c181339d6a61cda69fa3f8f01ef460efc3511360e9c50cb69
font_01_sfnt_off0000fef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF7 10768 bytes
SHA-256: 3910336e01106b3d26735675669764ec1a9fb3611db72e67ad3a70e0a28d3a2a

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