Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71118212e333a38…

MALICIOUS

PDF

80.4 KB Created: 2021-09-10 00:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 1e22230f103782e5cb0bc1f7d020815b SHA-1: a6f2cdb5ca84171b11e736e7dc2d5f873c39837f SHA-256: c71118212e333a3871d71ef04ec0a127ac11be7f5743a6682868a53e4fc63b00
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of creating many links on different hosts, a common tactic for phishing or distributing malware. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an intent to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc3d589a5---govazipiwafaxuze.pdf In PDF document text
    • http://metalzilemboeventi.com/userfiles/files/48743197372.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/pilibefolerexipatikix.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/31744043110.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/5081370584.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/ralodimijevovox.pdfIn PDF document text
    • https://htchninc.com/d/files/57592619154.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/98384794186.pdfIn PDF document text
    • https://mytopics.it/uploads/file/lujamakofudeletujudavito.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/26086337414.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/tatoxinesa.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/71283041823.pdfIn PDF document text
    • http://clerus.hu/files/file/gawoxige.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/neabv4cco2528i4b6rdu9pg9qq/25989533730.pdfIn PDF document text
    • https://kildevangen.dk/files/ragatigizetarijones.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/62139852348.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/73967195941.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/45326946911.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/69665438790.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/17452976517.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/34817511610.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/mogusavaguxevepamopuveto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=dream+league+2020+apk+modPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 17060 bytes
SHA-256: 51f27728863b625ef05936def216ba9e24540ea1b8c8f29b87982b2012dd9d82
font_01_sfnt_off00010391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10391 10708 bytes
SHA-256: 629fa14b3962c4de238568aa8b640fb5b6d2994af299ab560864b9f42f9e4d37
font_02_sfnt_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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