Malicious PDF — malware analysis report

Static analysis result for SHA-256 2416d6086d8645e0…

MALICIOUS

PDF

82.9 KB Created: 2020-11-23 08:03:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 695e4ad13ca7adcbbec26cd1b6a2b352 SHA-1: 98eedcee8918c1a957880bb8cba04a381525b19f SHA-256: 2416d6086d8645e03921ff4ac8069562c67bbe8dd6fec509447c75b1fc4df46c
156 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 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=jung%2527s+personality+theory PDF link annotation
    • https://belujewirozem.weebly.com/uploads/1/3/2/6/132681559/jiloxumikipe.pdfIn PDF document text
    • https://donibirumot.weebly.com/uploads/1/3/4/4/134463545/sofotuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5fb2ab9d1e38a.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/f28a73643f6354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_5f976a7f44140.pdfIn PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/3706770.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/tadovudumiwebezi.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/rojunev.pdfIn PDF document text
    • https://jabuzowe.weebly.com/uploads/1/3/4/3/134312688/zofojokefoxirelakuz.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/jivala/59743397416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a14aa6b-aec8-4e25-9584-989205467f16/miles_and_huberman_1994.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/guvomup.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/90483564393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b7832f-a078-4ff2-a17f-593d63486703/nukugovoreguzidotolil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89d85014-3383-4a1d-bff4-d471d5922ec1/50206843193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0368ec49-8b93-4685-8b3d-7415052ba125/81778909943.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/potato_osmosis_lab_results.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_off000107bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BD 5204 bytes
SHA-256: dab7733dae4100fe6bb9fc12f86dd197805604c0637f4e2ebfba79ea6f8b1c4d
font_01_sfnt_off00011978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11978 10996 bytes
SHA-256: 5a629f84e484ade6e4961f93ea5867f992a35e780f233a27d3914632b7d40bb7

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