Malicious PDF — malware analysis report

Static analysis result for SHA-256 12320e7b25e6a95a…

MALICIOUS

PDF

73.4 KB Created: 2021-06-13 14:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e4bbec34903f373220f06c16dd2273be SHA-1: 2096e98b0070fa7a3575055aecbd84635e8fc681 SHA-256: 12320e7b25e6a95acb69f07a2b8c70a4228d1b66bd95bfda095ce15587d2e731
186 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 0.9996

Heuristics 6

  • 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.
  • 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://smidgel.ru/pbw?utm_term=all+the+beautiful+lies+book PDF link annotation
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/88d1c86b8c571c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_602b5f830a045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462974/normal_5ffa5de0a2904.pdfIn PDF document text
    • https://bigevavez.weebly.com/uploads/1/3/4/0/134016854/f0b1e14.pdfIn PDF document text
    • https://xonatiwomunonow.weebly.com/uploads/1/3/1/8/131856992/6069974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489994/normal_6001e089c6af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_60364afc6634d.pdfIn PDF document text
    • https://didilajuti.weebly.com/uploads/1/3/4/5/134585724/2b00be4961be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5fdac127d42f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370273/normal_5fdc4805bd081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_6021ad993ac87.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/3234413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_606e25c0b4df9.pdfIn PDF document text
    • https://vuxisiso.weebly.com/uploads/1/3/5/3/135321279/fe261077ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_604d3c4acbdd5.pdfIn PDF document text
    • https://daxajofu.weebly.com/uploads/1/3/0/7/130740026/duzedozutovak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456391/normal_601d599a73a5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472488/normal_5fddda8c2a34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476429/normal_603cba76e8fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_6026036647091.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_5fdc88f082e2a.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_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 4952 bytes
SHA-256: 90eb26b1bc1e893b1fa84ffca3c045a0396bb110cec2dc3f5eafb16b82a47f6d
font_01_sfnt_off0000f454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF454 10724 bytes
SHA-256: 1ca8341bb5f327450b88728e313315b30ec5a7a70068196351ee2d8ee5dba9b3

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