Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcd0aee8052db5d…

MALICIOUS

PDF

63.8 KB Created: 2020-12-21 18:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7acc9273f87b64f1a04b673fe3ad2a86 SHA-1: b8ca8ef4980bc8025726ca2d555c7215e01296dc SHA-256: 6dcd0aee8052db5d4aa2cac4626f7e271cf4defe85060abdf883788e72e6de73
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/123?utm_term=camp+good+news PDF link annotation
    • https://misopiwulasi.weebly.com/uploads/1/3/1/8/131856666/1671597.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480598/normal_5fb7f6aff1ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_5fbf3dcf14e1a.pdfIn PDF document text
    • https://xiwajuropoji.weebly.com/uploads/1/3/4/3/134371127/f42bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_5f94e41f6e68b.pdfIn PDF document text
    • https://rizaxulizogi.weebly.com/uploads/1/3/4/7/134753796/wugiti-gorugef.pdfIn PDF document text
    • https://tawedituja.weebly.com/uploads/1/3/4/8/134864040/4127063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_5fa0833ee1d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456119/normal_5fca98e1e1ede.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/mapigibo-sikemo-limuwir-vusisivisubusat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc7b09c1c59a74bd9921651/t/5fc7e4693577ec55121da145/1606935657392/85979479556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429bdd40-60be-4104-b501-b09b5ea9fc8d/kabbalah_magic_and_the_great_work_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dedec90-646c-4553-8bf2-445ff40f0473/38657100835.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCF 4924 bytes
SHA-256: 43bc213a8b0c6b181640e147d59959aff83e9d753d65ac77a0e9f63abc29ed97
font_01_sfnt_off0000c087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC087 10164 bytes
SHA-256: 8eaf50e2ee91219b589603113eed2f6ffa15e713e6802587ba49ef53beb8dade
font_02_sfnt_off0000e316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE316 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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