Malicious PDF — malware analysis report

Static analysis result for SHA-256 68278c4a4019496c…

MALICIOUS

PDF

80.9 KB Created: 2020-11-12 17:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e7f81b31a814bda28bef13ba05f7a78 SHA-1: dc339f9553fa256be62a307e55e626ff908f6c5c SHA-256: 68278c4a4019496cc614e2727aff96f18fe3dfdf7f81450e9f4180cb60c41657
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 0.9997

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://trafffi.ru/123?utm_term=z-edge+dash+cam+troubleshooting PDF link annotation
    • https://fusefediwotedi.weebly.com/uploads/1/3/4/5/134589876/dee9d93e.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/819ac2f13.pdfIn PDF document text
    • https://xikemusuvef.weebly.com/uploads/1/3/4/3/134322181/c820255520f101b.pdfIn PDF document text
    • https://malinozibide.weebly.com/uploads/1/3/4/3/134380659/tozurivenepudukaxuwa.pdfIn PDF document text
    • https://defejeve.weebly.com/uploads/1/3/4/3/134386135/tolidu_subotirakakited.pdfIn PDF document text
    • https://jolamaripewefof.weebly.com/uploads/1/3/4/6/134655052/javofixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/6e6c8fe9-50ed-4316-a630-4671b8f138e8/defunedanibes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e55b1444-f3ba-4090-aa80-b3d3bb1c8ca6/adobe_lightroom_6_free_download_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40724062-780a-4a3b-9a3c-b229e7d837a3/divine_feminine_guided_meditation_sc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f678a090-7995-403c-a0b0-d0e835c99703/popotudajuradiwotozuta.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/arvada_west_hs_baseball.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1e781e8-f57b-4f6d-9501-e176af91482d/86390670549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9874172-f6bc-49cb-8820-6fcb81683574/fopinolupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa0429b-bdee-4ea5-b77d-67ce0ee33a21/36274942307.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC8 5364 bytes
SHA-256: f5c73037892d82ee6b98e823136137f2e675328673ca9b13f98888339b103bf4
font_01_sfnt_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 11384 bytes
SHA-256: 1bcc21352da745d9869d080f6312cea29d2ddd9f4afae5159d902162c3f37927
font_02_sfnt_off00012806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12806 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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