Malicious PDF — malware analysis report

Static analysis result for SHA-256 eece4194efd03001…

MALICIOUS

PDF

64.9 KB Created: 2020-12-17 16:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 73470758fc57ae16089da2e7c11500db SHA-1: ed1436d7062b8700442723c9066dde27fc94f5ae SHA-256: eece4194efd0300176561aa9483c53720f0332e72a1430b0aab30f215d715963
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the presence of external links points towards an attempt to redirect the user to malicious content.

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://trafficel.ru/123?utm_term=parts+of+speech+jeopardy PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f9aab63e377e.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/ad29d3322.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383572/normal_5fc62c2d3133a.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/kijovemafup.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/1efbfb90e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4c301972c46e3c9509f0/1606372404505/animal_testing_essay.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd10a44f07da69d6416e3d/1606226084732/fantasy_ninja_sword.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd016c30a162e0c4c3cab/t/5fc4dad7f81c9a2a0c3afeff/1606736600282/3105981636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da37194b-dac2-4b97-af41-16d68c2c78a2/gubutuv.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc576008ef7301f8b2fc014/t/5fd60e0e164d0f203c719798/1607863823328/manual_acronis_true_image_2017.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc4a6656457125654cf5ff3/1606723178047/bilivazolemogenukoparat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fcd3bdd9aa2de0c649fa01c/1607285726051/fimilexumesapirobaso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33b91b8467722f1e32cd3/t/5fc69d953570fb44d1eb3116/1606851993652/gizmohub_app_for_apple_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5052c19b-550c-4ba8-820d-e7db1fcc3ea0/pivujixejumudobovitutu.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_off0000c19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19B 5392 bytes
SHA-256: ca190279bc85da8725f97331dac1d512a2a9231dd171e78b9780db14654da113
font_01_sfnt_off0000d3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FC 10284 bytes
SHA-256: dbea85aa34be2e70b1854b971c3f68ba58d4565dfe842f635d8b0896a9c549fb

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