Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f95a8df744ac70d…

MALICIOUS

PDF

85.6 KB Created: 2021-01-06 13:35:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f93e598d522b2d1fa9ba826e251f2eef SHA-1: 22e363bddf051d0917703e3188afe40a8a5ed728 SHA-256: 7f95a8df744ac70d69121b9e8b8f35917ed214e4a8991d21b1eacdeaaf10d365
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. One of the extracted URLs, https://traffset.ru/aws?utm_term=difference+between+android+and+ios+charger, is likely part of the lure to direct users to malicious content.

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 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.
  • 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://traffset.ru/aws?utm_term=difference+between+android+and+ios+charger PDF link annotation
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/zivevigatedilodajis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f894a52bf397.pdfIn PDF document text
    • https://mutoxikaxinabab.weebly.com/uploads/1/3/4/8/134886861/145f75ba5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5fe9f9608797d.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/8122911.pdfIn PDF document text
    • https://rogenogenitel.weebly.com/uploads/1/3/4/3/134316557/tebodenosebonel_tazinuzakap_duvete_wesusutuzo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f953789d099c.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/dirokanuzogiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465938/normal_5fde2d56551dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fad8d806e823.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/memul/18782437113.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/meritubiw.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/informational_writing_prompts_with_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/android_studio_flutter_autocomplete.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/all_tms_ar_code_pokemon_black.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_off000111ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CA 5484 bytes
SHA-256: a1bef9b08dca6b404e61e4cea783b0cf04237f46a3b440140a387a666405ed46
font_01_sfnt_off00012480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12480 10736 bytes
SHA-256: 64b8a25d193e61510c7a0a72b224f5d593f89db2dc42670dc0204fc61226bc0b

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