Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94e960baf64bd44…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 12:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 37289c874e740e6cc3e8b53ad625c773 SHA-1: e7c03eb6edca26cbe27b6be6ad25ef9c0c8231f0 SHA-256: f94e960baf64bd44f61c94bcb20f1f7d495dbc0c52c6330df24fb045f8a4b2ae
186 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and an ML classifier, including ClamAV's Pdf.Phishing.Trojan signature. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body is heavily obfuscated, but the presence of embedded URLs and the heuristic findings strongly indicate an attempt to redirect users to malicious or deceptive content.

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://bologen.ru/aws?utm_term=what+are+the+seven+spirits+of+god+referred+to+in+revelations PDF link annotation
    • https://wovikuzejujitij.weebly.com/uploads/1/3/4/5/134506660/lotoxug.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/8720987.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/243a72.pdfIn PDF document text
    • https://xutagevobufoj.weebly.com/uploads/1/3/1/6/131607169/fc5c3d34.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/iijb0jj/92913833292.pdfIn PDF document text
    • https://kovofogigexu.weebly.com/uploads/1/3/1/8/131856149/3589983.pdfIn PDF document text
    • https://nulijuvak.weebly.com/uploads/1/3/3/9/133986618/sidetofijuvakazize.pdfIn PDF document text
    • https://tabofeluraratub.weebly.com/uploads/1/3/1/4/131438776/9331173.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/kegubinefuda/82970415864.pdfIn PDF document text
    • https://0f3c41ac-de96-4ba7-a517-026d7435d592.filesusr.com/ugd/8631de_aa960da916f44ca28e287a1e11419e1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d6210cf-9f37-466b-a9e2-9ab3a25c77d1/74138392356.pdfIn PDF document text
    • https://a43ab9c2-5efb-4cee-ac06-b782a0f5e207.filesusr.com/ugd/4826f5_dd0a106447a7466e97e9fb2b3faab7b9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8355b7a0-a4cf-45b3-b10f-794365a01611/vujelem.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_76f7c7b8b63d4d03a223b915b78ac5b6.pdf?index=trueIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_5a1a4e9a21f44e6e8669eaf998a30c86.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/82972318382.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/pejorojupus.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_off0000f634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF634 5376 bytes
SHA-256: ccb3eda1b970b18493d6981c04f319790930f57f53c987108cdf75d1f0f75c2a
font_01_sfnt_off0001088b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088B 12076 bytes
SHA-256: 39f4ca59eaff9d40a10e87fe0d0685a6209a81deb1b0b1f573b50bc03259638b

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