Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a12f8c74c12fd7…

MALICIOUS

PDF

68.3 KB Created: 2021-01-11 19:31:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7d2071e04d405f2a6530d01a3fe85d91 SHA-1: ce09c3c3a95fc9b427339767c19a9fb53d64234d SHA-256: c2a12f8c74c12fd76266adc71cb8f99f7ccc27c63bfb34ab0b7853b0588972ac
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, forming a link farm, and was flagged by ClamAV as a phishing trojan. The document body references a product recall, suggesting a lure to direct users to malicious websites. The presence of external URIs and a link farm indicates an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffi.ru/123?utm_term=fisher+price+deluxe+jumperoo+recall PDF link annotation
    • https://zunutupere.weebly.com/uploads/1/3/1/4/131453944/luruterowaku_wasetewi_zazekufux.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://cdn.sqhk.co/notokulojow/rifn4hj/minecraft_education_edition_chromebook.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/hfqcgem/jomop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_5fe661c82ffcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393916/normal_5ff69a4249543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f961c1431431.pdfIn PDF document text
    • https://cdn.sqhk.co/jomenuluz/hd1hhhS/78284149318.pdfIn PDF document text
    • https://site-1178255.mozfiles.com/files/1178255/23799374987.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460446/normal_5fcad79404527.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/71Xgeie/31919226472.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/iggfja4/42557574947.pdfIn PDF document text
    • https://cdn.sqhk.co/bogulevim/6q2Mcei/the_battle_cats_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/8jd33gf/burger_shop_near_me_open.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386074/normal_5fc6cc97ae3c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529780/normal_5fb2f6053e146.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB0 5412 bytes
SHA-256: 352f246047e423648822d5f1789d898e338ca5d04bf1e798fe97167a7ab161c3
font_01_sfnt_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 11224 bytes
SHA-256: ee4156d8c3fda6f8b61abcb8c4cd6785985ad1f73c8dc6421a0c98a47526c77d

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