Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea378b6949c92d07…

MALICIOUS

PDF

91.7 KB Created: 2021-05-16 22:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a0e346e317f723565ec53d1a3c8103e4 SHA-1: 1731cbd4333981c97bc8e4ed333d714eb964d412 SHA-256: ea378b6949c92d076e9f8a54ed47b85f72a51149983a7a7c646fca64e02a3e3c
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 0.9991

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://ponafet.ru/strik?utm_term=conversational+english+classes+miami PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416672/normal_603246a120cf7.pdfIn PDF document text
    • http://8gusevshop.website/your_uninstallerupgq1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426543/normal_6064ea6c0837c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387817/normal_5febdaa558597.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_60044ccace55c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fe32128179e5.pdfIn PDF document text
    • http://erogancolumbia.site/when_did_the_us_recognize_israeltizz5.pdfIn PDF document text
    • http://ruszaimclub.ru/wagon6bg6n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_605d69990eb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_6054b525ec680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_602d2cbd5a184.pdfIn PDF document text
    • http://lighttravel-ng.com/bein_sport_subscription_renewal_pricehh7y6.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/gozilum/35442355245.pdfIn PDF document text
    • http://vobuxex.epizy.com/61378282637.pdfIn PDF document text
    • http://vijiviwo.epizy.com/16311818769.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/rinomimevimadivi.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/nazotomopufesagumawavat.pdfIn PDF document text
    • http://beritoka.rf.gd/togoxalavubukesigifikesi.pdfIn PDF document text
    • http://getakufo.epizy.com/aja_ki_pro_go_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/bangla_cricket_new_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/how_to_do_forex_trading_in_pakistan.pdfIn PDF document text
    • http://bidavotajowev.epizy.com/moneyball_imdb_parents_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10701 5084 bytes
SHA-256: dcbbda95d8eaf27610a0486caa3bf7d7448323e672718833d0b5bc6e9ce328e3
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 10616 bytes
SHA-256: 3ddfd46c0c19303a81978bac89e3839231db5dcc1333018d98458a49ab33f4ed
font_02_sfnt_off00013c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6B 16448 bytes
SHA-256: 3f7f6beb0f5865f83039c8434023d34048916fbab515aea8bfee4d6c7e3f3101
font_03_sfnt_off000152c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152C2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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