Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f21b871989edf7…

MALICIOUS

PDF

68.6 KB Created: 2021-01-16 09:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ce009b0d0284b46bd1682e2f7b655aef SHA-1: 78858b39af28deaa49d21113d2c6fc4701d545f1 SHA-256: d7f21b871989edf72a6d56d1e3feb6a55e530968486e107ea4f268b35e4d48e0
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, suggesting an attempt to direct users to malicious content. The ClamAV detection and ML classifier also indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=hp+laserjet+pro+200+m251nw+manual In PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/nureparor.pdfIn PDF document text
    • https://pijuzuzubafewo.weebly.com/uploads/1/3/2/6/132695302/4954600.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/chjk5Y8/zokiwewi.pdfIn PDF document text
    • https://togawikanow.weebly.com/uploads/1/3/5/3/135320583/ad435beddcdd205.pdfIn PDF document text
    • https://site-1172679.mozfiles.com/files/1172679/my_little_baby_korean_drama.pdfIn PDF document text
    • https://birirewenojitu.weebly.com/uploads/1/3/0/8/130813362/powixiluf_wodutuvuk_wezaxe.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/rekorewexidiwo/access_it_universal_software.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/anbe_sivam_full_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/48977626320.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/avg_antivirus_apk.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_off0000cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB0 5544 bytes
SHA-256: da790ec9dcdae2af18c9a6488db82b1647543b8e30aa42b004dc9ae4f57f0811
font_01_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 10368 bytes
SHA-256: 581fc846672650515fd93b79404523b24df26ca46ed3b70f4d9644905e0cd99b

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