Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa32f784beda80c…

MALICIOUS

PDF

81.2 KB Created: 2021-03-21 09:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a37b00503eddb2413ee36a0f570e948 SHA-1: d4c3c036a4a80625c56a8982868e92da7d352831 SHA-256: 3aa32f784beda80c49144e91979f55012d74429d41b2a8a24cb36e51cb75217e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://bologen.ru/strik?utm_term=casio+g+shock+fix+time PDF link annotation
    • https://cdn.sqhk.co/kitatoze/cYhb7jh/xudagijaxinebix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485800/normal_60208e97640d7.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/4hijeL8/hacker_prank_simulator_app_download_for_pc.pdfIn PDF document text
    • https://webuxeneme.weebly.com/uploads/1/3/4/3/134368634/2a5eab33c20fc.pdfIn PDF document text
    • http://novoruxove.iblogger.org/29332754130.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/UU1wkjj/lupowebipe.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/ruxutirijobosijagiwif.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/dRgghf5/gilasaman.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/dezolobagosufo.pdfIn PDF document text
    • https://jaravexogozene.weebly.com/uploads/1/3/4/0/134041495/6065793.pdfIn PDF document text
    • http://talajifit.mywebcommunity.org/az_103_book_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_6004d2238c88f.pdfIn PDF document text
    • https://tatisosef.weebly.com/uploads/1/3/5/3/135333589/3580a24a59.pdfIn PDF document text
    • https://nanavefog.weebly.com/uploads/1/3/0/7/130775134/133766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozejozonamolub.rf.gd/15895991361.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/spiritual_emotional_freedom_technique.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/chirkut_odia_movie_all_song.pdfIn PDF document text
    • http://zozoramotuwiv.rf.gd/39971973406.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/amelia_bedelia_read_along.pdfIn PDF document text
    • http://nusakarut.epizy.com/20587382513.pdfIn PDF document text
    • http://xagubono.epizy.com/cacaoweb_pour_android_tablette.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/46891095800.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_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 5204 bytes
SHA-256: 4e97f3bfba5c5734d63f178f698ee0aa1b06be1e44cba3b4f86cd3026ac539b6
font_01_sfnt_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 10836 bytes
SHA-256: 395fc32e20e50fd9d87283a11f8daa2d36b596edfdf4f7a679b0a3188e2fce22

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