Malicious PDF — malware analysis report

Static analysis result for SHA-256 f380fee192419b5a…

MALICIOUS

PDF

109.5 KB Created: 2021-06-30 22:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e22564645d83c3292c438773e4ab878d SHA-1: 722101ae7463288d79a6dfd1d56ee3462dbe5466 SHA-256: f380fee192419b5a49771f2054b93341c3b40055b85d57dfca0dfc7e3a01e5c4
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9792

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://wastran.ru/uplcv?utm_term=meditation+to+receive+messages+from+spirit PDF link annotation
    • https://hogies.com/includes/template/uploads/file/54808009819.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/gakirineximezegod.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/9c271f0ca3918dfb0e10cb9b65755761/ranaginodanixoxoxopixalu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/qtievm6a6bo9g5edkipj3aiaun/farixenegekexusu.pdfIn PDF document text
    • https://airshow-bg.com/file/bimolekitezawutiliv.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/a943a3ca4f823585385c57ed90a94bbc/xexoda.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/ffff82c8462e499a611031a0bfde0701/65950443250.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16090f1f6bd81b---56245628191.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/82634f822ce967e4f93624281519fd69/gidemaropes.pdfIn PDF document text
    • http://whitebearlakeclassof1970.com/clients/0/05/05755deafc47004aae723e515cf08a6f/File/73737227589.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5810c7703---9799286159.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/6963863203.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/42413755714.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/lepumevolabinusagi.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160756c9091e8b---fisabatoxopagakewujotu.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6d536a633---67607132790.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/d7a9566bd1156a4b0dfa82f89ca21600/46614758879.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/92490036010.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/61049828afb2765afa18adcbb7de67e2/xubezowenegajenulelobex.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/5f88ede1bc2bdbb6c1586aaa02300f1c/tufafubobanofagiwigowoduk.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16099ef2849171---duxogedegema.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d45be6530f7---tenemivoz.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000127c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C4 18068 bytes
SHA-256: 5918103824c71051125fa47c190e6f749c89f0d17d54fcc2f34a1f8280662f3b
font_01_sfnt_off0001571b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1571B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F28 1912 bytes
SHA-256: 43a05ab79c2f05a8ca44326a5092d66fb4580a428e841ffdfc7cca19ea42c820
font_03_sfnt_off000177db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177DB 10976 bytes
SHA-256: cd46933fc9267e5590fe62263aee65e5a74b93582f1c715c6236d192a5f750ee
font_04_sfnt_off00019126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19126 16372 bytes
SHA-256: 13ce3736b0f13da67e02cfea9918075d334b48b6c0a6ed92965ddc61e002adda

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