Malicious PDF — malware analysis report

Static analysis result for SHA-256 557e288000c3ad1c…

MALICIOUS

PDF

43.6 KB Created: 2020-11-07 05:14:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fb2c29125edeeecd0d07c7a4cf49d85d SHA-1: 53f2082425113b07b65f34477d4bed35c3d39684 SHA-256: 557e288000c3ad1c1e8350d224e013bffe95240782933c46cc154fd69d4774b5
106 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 1.0000

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/aws?keyword=animal+jam+item+generator+no+survey PDF link annotation
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/5694357.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/483b82995d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fa25fbeed2a2.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/zodovisulu_gidimiza_vipofev.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/zuwiramulenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f985c96bfc75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381320/normal_5f8e74863bf39.pdfIn PDF document text
    • https://watuwejaxor.weebly.com/uploads/1/3/4/4/134437052/1664650.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/teddy_bridgewater_contract.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/black_and_decker_workmate_375.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/arabic_to_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/viladoragerizav.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/24242998381.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_off000069cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CD 5232 bytes
SHA-256: 28a6d57af184722206e1723c77b6248b3e8f22b2dd8202ff05e2796d9debde50
font_01_sfnt_off00007b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 11124 bytes
SHA-256: ce3c79c52f0ebe160c6e4333576a40eac1203822a88836cb8f4e27a8eeb32e06