Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d070054b32c4e03…

MALICIOUS

PDF

64.1 KB Created: 2021-02-15 03:26:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6ad38bfa2fbb31b1938c0f3ec72477bc SHA-1: 95491461a8a673931436104c458db920afa6db01 SHA-256: 6d070054b32c4e0373ec0e1728ccfe721140c8183f2b53eefa3932a25c4886c8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/wix?keyword=area+code+52477 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409102/normal_6005ac2e80f34.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/6bvdgfT/98928032401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452587/normal_6011703f784ff.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/Egfieyn/78111901717.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503791/normal_5fecf2c42e655.pdfIn PDF document text
    • https://xunumiselodaz.weebly.com/uploads/1/3/0/7/130775676/da59db8a40e39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452862/normal_600024088d162.pdfIn PDF document text
    • https://redumufisinuf.weebly.com/uploads/1/3/1/6/131636648/5007450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_600c79fb162ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403119/normal_5fd6718bc2b23.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/jZieBBg/79601635243.pdfIn PDF document text
    • https://bunofavaluz.weebly.com/uploads/1/3/4/6/134661637/5080371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385634/normal_5ffe957cbda95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_5fd29adef30e1.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/NQvhdjf/classic_bubble_shooter_retro_game_y8.pdfIn PDF document text
    • https://cdn.sqhk.co/lijuwezasip/gjggjij/smash_joker_hitboxes.pdfIn PDF document text
    • https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/4ee9aa6d52756f.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_off0000be8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8D 5136 bytes
SHA-256: f19cb3f51aaafcd85ee31a647b365db98cd43fda8ea1557341bbd99f2a96fdfb
font_01_sfnt_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 10428 bytes
SHA-256: ddb7b39fc1a0f95ef9b2dcdfe0e279ee213d1cee61bad1096b3eed5a0e0c5912

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