Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cfcbefef42f3ee…

MALICIOUS

PDF

73.6 KB Created: 2021-06-01 17:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 29d42a0cf9a1534c1f83345aa0892d79 SHA-1: 6ea7b6cb302ee749a6a9e279b02c9a8dcb1d2a4b SHA-256: d0cfcbefef42f3eedbb4ab96b9d70ade1d87a7e2fb1986535e1de47dc0bebc68
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The embedded document body text is heavily obfuscated and appears to be junk data, but the presence of URLs suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/123?utm_term=shatta+wale+prophecy+official+video PDF link annotation
    • https://maselevajaf.weebly.com/uploads/1/3/1/3/131398143/1b189e514c4bfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405904/normal_605f1a58b1869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403415/normal_603a51c22d66f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456116/normal_602de316c029a.pdfIn PDF document text
    • https://derivasip.weebly.com/uploads/1/3/1/4/131407068/0d76892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_6015d7211f91b.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/fivalefixedasip-lejeg.pdfIn PDF document text
    • https://kojiwoxoposegig.weebly.com/uploads/1/3/4/1/134108885/poselatebepufib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_60352a1c2f234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443823/normal_5ff662ed0ed1c.pdfIn PDF document text
    • https://jubolovewo.weebly.com/uploads/1/3/1/4/131453214/55455245edf.pdfIn PDF document text
    • https://rolarijigajegij.weebly.com/uploads/1/3/1/4/131438579/d1b3b21f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_60539ca2abc0e.pdfIn PDF document text
    • https://vorexumezekadan.weebly.com/uploads/1/3/0/9/130969740/pogozudaso-zuxawibodezisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_600dd6dd733ba.pdfIn PDF document text
    • https://wejigawavopon.weebly.com/uploads/1/3/4/3/134305277/5893061.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c01f69fc-6b95-46c0-804f-0b55859895c9/jorufajutamasuredijobowap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e83cc1c-b1ba-4265-8c2b-23b64697d264/fukozaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0cb5dcf-5ac9-44c0-8639-4efc37f1a078/36662152634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7544c901-cfb7-4ed3-ba89-43b1fcc08fd8/what_is_afro_asian_literature_meaning.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_off0000dd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 5420 bytes
SHA-256: 83019eb21fd77496b220dccac6f223770cc4a388d65127fcae8164f7bb73b45b
font_01_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 11760 bytes
SHA-256: 39135f7286a7b71c00aabe907cd008872de77a8ecb8d3e952758242bca3a9067

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