Malicious PDF — malware analysis report

Static analysis result for SHA-256 192d46a0d0d1beca…

MALICIOUS

PDF

71.7 KB Created: 2021-03-06 23:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 05bb61ffb5bf567041d049675e04ef9a SHA-1: ded6f9fe853bb195c0c1b73224402f2fd196e1a8 SHA-256: 192d46a0d0d1beca9643fedf365dc06dafb0bb2c6f2077a5d799647f0762b97f
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 0.9998

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://maypoin.ru/wix?keyword=smule+sing+apk+hack PDF link annotation
    • https://divaruwidis.weebly.com/uploads/1/3/4/0/134042650/a7a14a4.pdfIn PDF document text
    • https://lekipavovat.weebly.com/uploads/1/3/4/3/134332936/8477672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fc739b2da55f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_6032cb1ea61ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_5fed109aa95e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371536/normal_5fe0094996f7d.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/9363566.pdfIn PDF document text
    • https://xulakuvoloja.weebly.com/uploads/1/3/0/8/130813987/pavibapeva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_57e025465a524a87bed253d7aecf25ed.pdf?index=trueIn PDF document text
    • https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_7ce7c528434a4de89a731c6fb6c4ff9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/760c7c63-f9b9-4109-b713-c89fed5b20bc/plantronics_wireless_headset_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/dutodole.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/14906492890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8226b351-64d4-44dd-964d-597d053c3e6f/niwofedupidevuniwumi.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/8802979619.pdfIn PDF document text
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_24c0522673fb42c9be74595bbf123a28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/baladobogafe.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_off0000dcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC3 5416 bytes
SHA-256: b8cd085307a5b1d04480e9b63e2ec9d22dafabd6ab234553698dbf949be7bfa1
font_01_sfnt_off0000ef0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0E 10236 bytes
SHA-256: 2dd4fea5c71917222b83a2c62bab4f1ee44f67d14c02ce1b9fd3a42e352ae9c3

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