Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28a4863c11856d0…

MALICIOUS

PDF

62.7 KB Created: 2020-12-13 16:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 65d3eeeccb4fcd4d79c52321631c5968 SHA-1: 7257ddc323877679d220da1497799fa56ee0fcb3 SHA-256: f28a4863c11856d0880e56819055aa5735a57cfcaf1577d1b9ed735891319925
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a mass external PDF link farm and an SEO redirector pointing to the URL 'https://trafficel.ru/aws?utm_term=t+shirt+design+template+vector+free'. The embedded content suggests an attempt to lure users with a 'free t-shirt design template' lure, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?utm_term=t+shirt+design+template+vector+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5f9fc95e2a7ef.pdfIn PDF document text
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/2172660.pdfIn PDF document text
    • https://bupifepubeweta.weebly.com/uploads/1/3/4/3/134336259/xiziva-nogixabosedegir-jutetinidejedag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5f8d4e3b2d7b1.pdfIn PDF document text
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/8519b73c1d05a.pdfIn PDF document text
    • https://sekorora.weebly.com/uploads/1/3/4/8/134856449/fodorozuneva_jugilunaduwufit_wonuvofo.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://uploads.strikinglycdn.com/files/221f6c4a-a274-472b-992a-40bc6bf47004/lepolezajodud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/256f1013-dc0f-4c24-8bd1-8bef69538148/katekozesapudefus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ddb891-d891-4b9c-98a5-94eb6a5ced81/ib_extended_essay_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed282656-f8b4-46da-ab3e-40b3dcb26ccc/historia_de_la_odontologia_en_mexico.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aff7a13a450bab152330/t/5fcf27cbcaa95a391e67e4fc/1607411659795/zed_aram_runes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f4615687f52b6b8e9594/t/5fcec03269d6d06d552b5b1f/1607385144047/21359827769.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE17 5368 bytes
SHA-256: b81293a95f20e3ec372fa773507e97f845eb26793dc2e293eec80f4114dc0431
font_01_sfnt_off0000c029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC029 9380 bytes
SHA-256: c13e880265d288f81c5d7a26c5d47103e224acaec6cbd0f76522133d9360eaf6
font_02_sfnt_off0000e049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE049 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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