Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bbd5dfe225f378…

MALICIOUS

PDF

74.4 KB Created: 2021-01-28 01:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 01b57dab00373e045662abe0080a861c SHA-1: ad756ab4091778abaa8370c681b7d2331d2948c0 SHA-256: 08bbd5dfe225f378ab4bbc614f4882215e9475017e33b1f997cad454a24bb64c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs with numeric slugs, indicative of a link farm or SEO manipulation. The ML classifier and ClamAV detections strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious or deceptive content, possibly for phishing or malware distribution.

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://druttle.ru/wb?keyword=dermaset%203d%20rollerball%20eye%20serum%20ingredients PDF link annotation
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/nupukutoguwew_likobijavaped_zizonibevij.pdfIn PDF document text
    • https://beluloxepivizor.weebly.com/uploads/1/3/4/1/134131295/5115823.pdfIn PDF document text
    • https://gapidegit.weebly.com/uploads/1/3/1/3/131379699/81e01.pdfIn PDF document text
    • https://wamogipoko.weebly.com/uploads/1/3/0/7/130739383/tenasew_xamumezuwasejev.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/cidhgQL/51501390597.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/ljijcej/91091688369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_5fd2e02e21e1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_5fe80ce25e4d0.pdfIn PDF document text
    • https://tiletemilowa.weebly.com/uploads/1/3/2/7/132710791/jolajajaz.pdfIn PDF document text
    • https://todegebonuvakef.weebly.com/uploads/1/3/1/6/131606144/5325979.pdfIn PDF document text
    • http://sandiego-podcasts.com/wipodestx7b.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/bidurudilidujug/apental_calculator_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/24371082057.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/52666292571.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/dobepugovedexan.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/agrasen_pg_college_varanasi_online_form.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_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 5552 bytes
SHA-256: 84982567f18b86c1b6a0588e842a73468b8a6a6583ee1f001d3b2c2f7fef11f2
font_01_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 11472 bytes
SHA-256: 4cd6a3987dec76a02b4c1bf38a8adf48c3523af1cb472d78b3ceed6c4692e9f9

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