Malicious PDF — malware analysis report

Static analysis result for SHA-256 b460bf66e3861602…

MALICIOUS

PDF

69.7 KB Created: 2020-11-10 12:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9da53a533dd0cc6e8f770bdc2977c1b9 SHA-1: bb20920e13f94e806d7b70d260fafcdfa6b43163 SHA-256: b460bf66e386160249453df2ab1e09e42b3a8c24f669fc6e9d17ae92017c7397
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of a URL related to 'mp3juices app download' indicates a lure for users seeking software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffine.ru/aws?keyword=mp3juices+app+download PDF link annotation
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/loroli-benavodeni-xowetaruweme-niwilipawolis.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/8af31c501eeb680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f87241b6812a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5f920e58acf09.pdfIn PDF document text
    • https://juzatimeb.weebly.com/uploads/1/3/4/6/134605854/kipuzejufoper-sajelobinuzixeb-defimalo-jafutekikaxevo.pdfIn PDF document text
    • https://nazizuvadonilu.weebly.com/uploads/1/3/4/5/134590702/5042828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5f97fc2179cb1.pdfIn PDF document text
    • https://sumulejuno.weebly.com/uploads/1/3/4/3/134361372/felavaromen.pdfIn PDF document text
    • https://nagafijobe.weebly.com/uploads/1/3/4/6/134621550/1d76d8c14048dd4.pdfIn PDF document text
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/f1fcb3.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/3be6e9b4-718e-46dc-ba90-8fd9c4b9f1d1/subway_surfers_apk_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/wubewawinepez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58fe326a-fdb5-4712-a956-4f4c7dadf901/gagetubakabubotot.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_off0000d470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD470 5308 bytes
SHA-256: c4936cf7e2c43c9e97990c45ec07e128747382fe638fe8913ce8464121128c5c
font_01_sfnt_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 10424 bytes
SHA-256: 3d904a3df09c7431bbca73427d4414e65307933a11b54dcd1172e22f48bb8e6a

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