Malicious PDF — malware analysis report

Static analysis result for SHA-256 120e48e8a9f360b6…

MALICIOUS

PDF

74.8 KB Created: 2020-11-27 10:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fcab4e78100c84defeb8a47c6af74ca8 SHA-1: d31782522c85109bfe28b93df7ded56d0d2e6a8e SHA-256: 120e48e8a9f360b6b458662a4d6aefc53729031be50ca0d0a405100cb37d1df0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffe.ru/strik?utm_term=all+the+king%2527s+horses+vonnegut PDF link annotation
    • https://wubudonujekud.weebly.com/uploads/1/3/4/5/134524452/1225970.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/jolazu.pdfIn PDF document text
    • https://batatebuve.weebly.com/uploads/1/3/4/6/134676181/zezumow.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://s3.amazonaws.com/xeroguru/behringer_x32_digital_mixer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/dupodevetijeven.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/mcq_answer_sheet_cie.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/businessman_3_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/jajimijeduguxagu.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/rimukegexanerilofevaseb.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/dadotutefobaniwu.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/sekixonefavok.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/89728158825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010f4366-2747-463e-8c8b-722a5dafcb49/3668520628.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/tuganamizowixarotuzajet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4B 4764 bytes
SHA-256: 773af9a00b19052c28dd8dbf9db2d84835d8fba186442836c0c5c942491c1003
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 10084 bytes
SHA-256: fab4db324a8ce760fd2361bf9af0988c4381b4e4d766cbf8480d410b888eb818
font_02_sfnt_off00011024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11024 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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