Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5021582ee2473c…

MALICIOUS

PDF

41.0 KB Created: 2020-11-09 00:57:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 168273ed4dcce24714d24dc0dacd4b80 SHA-1: 60eb2d079fdd404c65ea797d580ffbf3471d49c3 SHA-256: 5b5021582ee2473c894dd95668a8862f8290bfe45732138298f07ab74de7875b
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded links, with one prominent URL pointing to 'https://trafficel.ru/123?keyword=major+graham+mansion+virginia'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for a large number of links, suggesting a malicious intent to manipulate search engine results or redirect users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/123?keyword=major+graham+mansion+virginia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f87be7250fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f87147f16513.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/xagadibegu.pdfIn PDF document text
    • https://bimufoju.weebly.com/uploads/1/3/4/3/134311804/a635822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f870f81efa91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zusanovo.files.wordpress.com/2020/11/tolijibaweduta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bd57737-61bc-4045-b385-2e4f838651be/35587599030.pdfIn PDF document text
    • https://sedinewo.files.wordpress.com/2020/11/zombie_frontier_3_hack_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc66da0-7575-448c-a0c3-a1dded8c6d13/pobuzelopotaturelomibofu.pdfIn PDF document text
    • https://sugadoden.files.wordpress.com/2020/11/zirisixopufituwapu.pdfIn PDF document text
    • https://sipugipinur.files.wordpress.com/2020/11/nodure.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://tovijid.files.wordpress.com/2020/11/91630450751.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000635b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 5208 bytes
SHA-256: e618c9fce4145fd25ee2fb3e6f01ddade93bc2fc73beb3a9646dd809675069d8
font_01_sfnt_off00007504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7504 10104 bytes
SHA-256: 94f35879d8b23aae2fc00ac543a518f0a7bd394c7fe4404aec72420d922364ed

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