Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1ee6683d35630f…

MALICIOUS

PDF

85.1 KB Created: 2021-09-05 10:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 13ac833cfce1eb4bdaa0c9b3797d87c8 SHA-1: a37e22ad0bbaf975fc6f8c86072479e4b8e51ed1 SHA-256: ba1ee6683d35630f314c1f08e67929372dfa193e5725d6b3ea86c06a4be72d68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to redirect victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16091a407d7507---tijovakuma.pdf In PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/jgrc0no0v67rke2f4fi7bm1754/nuzadalin.pdfIn PDF document text
    • http://normel.org/files/upload/file/nijuzowogusesefe.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/moxoz.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/wuxodikumajadadunipabo.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/lopakekenoge.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/funiwejaxufazoju.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/7f5325667af662859f559c3c606d2681/25620952080.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/mubazerabikab.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6huq440l7ujfraohr5etboja80/napora.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/pomaguzujavabotorapo.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/og8oe6kld6mmtcti518pjdre0q/roteve.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/jumakewujijunegifuvujoxi.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/41234554765.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5da5380c77c032278df8e352424afe3b/gusuto.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210628061556.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/zivitumofebix.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/8a6b41d6183cfe364c8798d466e30449/fubilodilamajasom.pdfIn PDF document text
    • http://artside.org/data/temp/file/5762957451.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/46830463352.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f04b2e8ed4c---foxozunanifo.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/naxiwevot.pdfIn PDF document text
    • https://0900107678.com/upload/file/fupezisakepemoxuge.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/236170269.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/41209684618.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608084a82bbd3---22287396276.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=orbiter+2016+manual+pdfPDF 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_off0000e71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 17504 bytes
SHA-256: 4efea2f42421ff8eeaf9a5c9a9c266da25c77355767f6da3539f6a690eb34e1e
font_02_sfnt_off00012d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D08 11100 bytes
SHA-256: 51943b05973da7718727b7d093b3c9ca2a88676defb0015e3e4c4c7ed68d7c7f

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