Malicious PDF — malware analysis report

Static analysis result for SHA-256 973827cf7de6d8fc…

MALICIOUS

PDF

78.4 KB Created: 2021-01-16 12:17:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 64431a4893df7ed4a51f514f6a00be0e SHA-1: 22b6c1988126eca82d339d49a4d7b6b055412a81 SHA-256: 973827cf7de6d8fcba6f9fbb8292f9d673e1e0fdc7887a5d8abd116cd651bd3d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and likely phishing-related. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary malicious URL identified is https://trafffe.ru/aws?utm_term=bongo+flava+songs+free++wapmight, which is likely used to host or redirect to malicious content.

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://trafffe.ru/aws?utm_term=bongo+flava+songs+free++wapmight PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f9a2825985f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f980fa94a794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479212/normal_5fb91d2787b59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5ffa606e60b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5fa65eff85e2c.pdfIn PDF document text
    • https://tarivoda.weebly.com/uploads/1/3/4/6/134693378/kukakolagiwuku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5fce4b56240a6.pdfIn PDF document text
    • https://bozaveruri.weebly.com/uploads/1/3/1/4/131483492/259165.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466135/normal_5fc6bc1be64f8.pdfIn PDF document text
    • https://site-1168038.mozfiles.com/files/1168038/wevodetujuzadifipin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503524/normal_5fdb677b9a880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_5fb915b2e3e79.pdfIn PDF document text
    • https://site-1166717.mozfiles.com/files/1166717/download_real_chess_3d_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5fc04ba62d816.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/wupixufekijax/gingerbread_outline_cut_out.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_off0000f4b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B1 5516 bytes
SHA-256: fac6a76850294aeb39e009d42942a8db116c10ecc5271984569ec933f12c125b
font_01_sfnt_off00010770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 10780 bytes
SHA-256: 70fa05751202dfab99ef416fc0252eb489fc30e262f77c3218e7ea1f1337ec72

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