Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a75c7af8a426dc3…

MALICIOUS

PDF

61.3 KB Created: 2020-11-23 21:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d9ac229da319e0ee20d53877ce6b9603 SHA-1: 5e3ce967cc2d15066914ed3d943fb96b178e6e92 SHA-256: 5a75c7af8a426dc3fe0ec803be423c019608bac1d628e91bd9a2b231e02a86ce
184 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with several pointing to known malicious redirector infrastructure like 'ggtraff.ru'. The heuristic firings indicate it's a link farm on disposable hosting, designed to direct users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 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/123?utm_term=glass+l+desk+canada In PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/gufetedumero.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/424377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f88675c070ac.pdfIn PDF document text
    • https://sokikafumuwo.weebly.com/uploads/1/3/4/6/134697409/4383594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f86fa81c9644.pdfIn PDF document text
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/jidesavadixuzutimisu.pdfIn PDF document text
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/tupinonij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f8854deba7c3.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/powipugasi_lewid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_5fa745476792a.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/seluke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f9dd0246ea15.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/6e26c6fd-e5f4-4fd5-9afe-09cad4e5ebd0/purolator_filter_cross_reference.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ece7195-408a-4472-9b13-e38cc3dc1fd0/turidenarazejazajade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55748aa4-672d-42d2-9c74-638a4baee1ea/66807861361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47efe73-45c4-43a5-a038-6d54836b2443/dragon_city_how_to_get_gems_no_hack.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_off0000b3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3DF 4932 bytes
SHA-256: bf3ba2af03e0bfdeac609198ccd81210c99ee5a59d40fa8b0e6c905f5d89dc48
font_01_sfnt_off0000c4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BF 9976 bytes
SHA-256: 63b21179b2be4a07aa5fc355e4e08667efdd8b4fc75c9f6902795765a0a2b50b

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