Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f06b238b45604a…

MALICIOUS

PDF

86.2 KB Created: 2021-06-06 11:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5e1e1aa8c51bc1493418cd92c55f118a SHA-1: 271a6521d77513b25085ed081786ec19ecb843ff SHA-256: 01f06b238b45604aa388f7dabebcdeabbec07edd4918ef7052b0cd047b459ca6
134 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are used in a link farm pattern, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cructi.ru/pbw?utm_term=fifty+shades+of+grey+online+legendado+hd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409602/normal_60664df2d8d0b.pdfIn PDF document text
    • https://sarutofujatazix.weebly.com/uploads/1/3/4/5/134584212/buwepodatenita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411921/normal_6036145b393d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6043e3484383a.pdfIn PDF document text
    • https://fokubazukif.weebly.com/uploads/1/3/2/6/132683137/8730f4904a49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493905/normal_5fd1149aae3d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459028/normal_5fe6fe8376ccf.pdfIn PDF document text
    • https://gofabede.weebly.com/uploads/1/3/1/4/131453232/5744301.pdfIn PDF document text
    • https://diwopoko.weebly.com/uploads/1/3/4/5/134597367/zujibaxagilewo.pdfIn PDF document text
    • https://panenojaro.weebly.com/uploads/1/3/4/4/134482399/2e5adbb187.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://morabef.pbworks.com/f/debut_video_capture_software_key_2019.pdfIn PDF document text
    • http://suniger.pbworks.com/f/xupovokexojaxuvepazeriti.pdfIn PDF document text
    • http://pajinap.pbworks.com/f/78943579907.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/present_tense_english_worksheets.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144416790/dan_devos_car_collection.pdfIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144649173/bolujikolexew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8f665a-253b-4601-81a0-643a0312ea18/diana_her_true_story_in_her_own_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee593d61-9430-44a8-94cd-fb5606d57869/sample_cover_letter_for_tourist_visa_application_south_africa.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/how_to_reduce_your_cats_stress.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/w/file/fetch/144454722/65305752189.pdfIn PDF document text
    • http://vixifalino.pbworks.com/w/file/fetch/144703743/71901961968.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000130b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130B2 17156 bytes
SHA-256: 10e90daaa4b2a1a9b984b1f0bcaaf27904fc75ab19415bcaaf1c0bdb5307d4bd
font_00_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 5224 bytes
SHA-256: 9268967c59c88b407c991ba162acaacddfa3de840caf522ee8eee1adeb4a42fc
font_01_sfnt_off00010377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10377 15688 bytes
SHA-256: 5c109eda3577daf8904db0002c81b7ee4dd81fdd6f2a6045aac2efbc575d60f6