Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de546df468fcfc1…

MALICIOUS

PDF

70.2 KB Created: 2020-11-11 13:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 05938eff568a414431dcc40e6ba99667 SHA-1: 9fe1b6fb8f2249c5724a5f1aecb8ec5c173cf31d SHA-256: 3de546df468fcfc187281b7676abaab10765281eb35b6b61ea223b326d5e7d7e
156 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 multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The document body, though heavily obfuscated, contains text suggesting a lure related to "Wish free shipping coupon 2020". The presence of numerous external links, including one to "traffine.ru", indicates an attempt to redirect users to potentially harmful websites, likely for phishing or malware distribution.

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
  • 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.
  • 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://traffine.ru/123?keyword=wish+free+shipping+coupon+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5fa30a6ebd40c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372673/normal_5f89513b9a766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473902/normal_5fab99eb0d092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5faaef6a0ec4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406806/normal_5fa03efaddc1f.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/8fdeca6740ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5f9369b1c8d0a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusuberu/pokemon_shuffle_hack_apk_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81beda38-b2ac-4d8a-a4a1-31bb0c7be2b3/80217568806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31f056d-bd1a-4190-9a2a-e86c26c6e5cb/manhattan_foundations_of_gmat_math_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da467ad7-8e25-4a94-8535-f4190f1a30f5/figuwagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99eae2e-db3d-4484-bad0-1017040f84e3/mur_mur_atlantic_city.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/chapter_12_study_guide_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba04942-c27a-4746-af25-4e5c755b5a92/2328526420.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_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 5320 bytes
SHA-256: 2126b9b038eaf00fa7e32daededc73a91b09eff0df327450751d17c80eb068e6
font_01_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 10804 bytes
SHA-256: fd8d6a82851467349eb4e7ca2c8d60cef60eda8888bd0770a7e025d0e1ecc6ee

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