Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04bac525d977fd9…

MALICIOUS

PDF

67.0 KB Created: 2020-12-02 00:18:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6bd37672b862c91a61c0b67f24456280 SHA-1: 7a4fab314a249ee9bccf99ad726a36e8816b10d7 SHA-256: e04bac525d977fd9e3f55bbe844ae1eccbfc3b0709b5885db926d29f4e5cbe21
244 Risk Score

Malware Insights

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

This PDF was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it likely serves as a phishing or SEO spam lure. It contains a large number of embedded URLs, including a critical redirector link to 'traffking.ru', suggesting an attempt to direct users to malicious or deceptive content. No scripts were extracted, but the presence of numerous external links points to a link farm attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?utm_term=belinda+blinked+2+pdf In PDF document text
    • https://molegogadamo.weebly.com/uploads/1/3/4/3/134341439/nurof_luladipijov_sovikefaxe_fojigituzafavo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870c656ca4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5fa3cbe02cabc.pdfIn PDF document text
    • https://tutofegabosig.weebly.com/uploads/1/3/4/7/134725810/5528420.pdfIn PDF document text
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/251ff6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5fc5f8f3c0654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22275142-c1dc-4735-927e-bd26872ac226/lasticit_prix_exercice_corrig.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/purajiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ca4ce8-c217-4e21-a550-7b4d8f75e194/kegugasunavoduwor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb1ae9fc3622d51d09b9/t/5fc0e1d92dd96f59180ff096/1606476249738/72903979041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb50766-89f2-429d-a3c8-925d7bf2fd8e/firehouse_nutrition_information.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde9d26ff1194f7385b9/t/5fc6be1d2ac13f1ee9a2ef68/1606860318055/friend_finder_app_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/phonics_worksheets_free_printable_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/228b9715-5cc7-43d9-b583-0e3a97857917/72913961552.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_off0000c7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E4 5148 bytes
SHA-256: eea36825cefa99bae2d478b5b85880d8edd35ad47902a1543d20ef7adf75776a
font_01_sfnt_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 11440 bytes
SHA-256: 5b1a175e4cb24864962a59ee59dc27648fd40da30447fca7a63403bea0b1dd41

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