Malicious PDF — malware analysis report

Static analysis result for SHA-256 292f104091a391de…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 01:23:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 903e062dd4f02a268901f2d56dd595b5 SHA-1: db80f144dfcb3b30d871536adfcdd48e930eab27 SHA-256: 292f104091a391deab02cc0f89a4ce816f8be8b67ead15908229770ca95fc7e8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to other PDF documents hosted on various external sites. One of these links, https://ggtraff.ru/aws?keyword=the+guitar+amp+handbook+pdf, is identified as a known malicious redirector. This suggests the document is part of a link farm designed to distribute malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/aws?keyword=the+guitar+amp+handbook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4407789/normal_5f928f7920157.pdfIn PDF document text
    • https://bepikasubezitix.weebly.com/uploads/1/3/4/3/134325559/5eee4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5fa2176e09ac7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/solonebosop/adobe_illustrator_logo_design_tutorials.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/anganwadi_vacancy_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0ebf90-2d6e-4d9a-bdc6-d81e43bbdd81/nanilutepomotawu.pdfIn PDF document text
    • https://lulukevonifu.files.wordpress.com/2020/11/60896074232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca773ea1-8251-4f2b-b8f7-31bc89d9777e/animal_crossing_new_leaf_house_upgrades_total_cost.pdfIn PDF document text
    • https://ludepofode.files.wordpress.com/2020/11/manual_photoscape_v3.7.pdfIn PDF document text
    • https://rezowus.files.wordpress.com/2020/11/sukesifovupif.pdfIn PDF document text
    • https://lifokeveju.files.wordpress.com/2020/11/63362487838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45ba1e3-ef29-496b-9569-8b97d1bc4a53/dugig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d7b43b1-6899-42ec-af46-e377e8d8d160/synopsis_of_forensic_medicine_by_nar.pdfIn PDF document text
    • https://pifakimep.files.wordpress.com/2020/11/fododuxuxinoni.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E8 5280 bytes
SHA-256: 94f833837dd0f875ff568c4a3d1439e8a87f3b73fe0735bdcaf3c39f1ccdd699
font_01_sfnt_off00006bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB3 10556 bytes
SHA-256: 3bffaf3bf597590c055e554449778c9b29737fa756b436d7efd18980135f5d99
font_02_sfnt_off00008ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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