Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a57cf514e9af8a…

MALICIOUS

PDF

63.0 KB Created: 2020-11-29 09:34:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5489e1e287be68df99906c3872059b66 SHA-1: 74527632119edd189b50886af557e93854a7278a SHA-256: 34a57cf514e9af8a5f2f0137063455642f5c1629cdc769f5c1fc4e73b406ba8d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, with 'https://s3.amazonaws.com/tiduro/5th_wheel_campers_live_in_full_time.pdf' being the first identified. Another external URI, 'https://trafffi.ru/123?utm_term=pints+to+gallons', was also extracted. The document body appears to be malformed or obfuscated, preventing a clear understanding of its user-facing content, but the overall structure suggests a malicious intent to redirect users.

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://trafffi.ru/123?utm_term=pints+to+gallons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457857/normal_5fa5d48508e47.pdfIn PDF document text
    • https://rurujopolobadez.weebly.com/uploads/1/3/4/4/134444805/busilew.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/03975cbaa.pdfIn PDF document text
    • https://loputoporebile.weebly.com/uploads/1/3/4/8/134847610/243f9ec01687df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fa365bb1a064.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/tiduro/5th_wheel_campers_live_in_full_time.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/4508366026.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/mayflower_compact_worksheet_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e649b8a3-d7d3-46d4-8f34-03a02dac608d/4770172943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b1e62d-011b-4968-b8a4-3ede770af849/762078728.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/simple_predicate_examples_list.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/isa_international_standards_on_auditing.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/pl_sql_developer_set_date_format.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_off0000b9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9AE 4760 bytes
SHA-256: 69c6570eebe49037c4fb1df52afcdb38b944fbc869ec5b84ec123c124fb2aafb
font_01_sfnt_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 11156 bytes
SHA-256: b5d3173b3d80d688aee6f61b69c568bc4fe7ee2dc5a53eef6e274a704d2d02b4

Open this report in the interactive analyzer, or submit your own file for analysis.