Malicious PDF — malware analysis report

Static analysis result for SHA-256 74b914f1e0ffca0f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-17 14:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9bae4d6bd879224de87122d17a2b463c SHA-1: b7f6f3804a8b4795e9d7448fe05f4b045498ce86 SHA-256: 74b914f1e0ffca0f71451d4041b948ef386da0ac0cea67d224c4acf33e845d97
204 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated, but the presence of embedded JavaScript and the overall structure strongly indicate it's designed to exploit users through deceptive links, likely leading to further malware download or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=mortal+kombat+11+mobile+cheats PDF link annotation
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/hcb9ueatnerr3td70ahic5poga/39463293554.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/kinizagujomirav.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/92190423409.pdfIn PDF document text
    • https://www.domosystem.gr/ckfinder/userfiles/files/kabazosadevumefolutomojor.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/bopesunejiv.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/97201665955.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/81244095662.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/77047655705.pdfIn PDF document text
    • http://cameragiaminh.com/upload/files/47102953607.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/52696810805.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/nulubajaxibojerudipu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16142fcb44ff8b---bideduvotafiturotobimuna.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/6f25854b892368e21867a75778480f5a/litumozamagibolad.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/ruvukorisurijafetavibab.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/48977605039.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/suputujexujeludi.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/zudiwunavinonujoloj.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/xarebanonawoxujuwoje.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/pewinogagudazupefadeka.pdfIn PDF document text
    • https://mintedimages.com/ckfinder/userfiles/files/xixidadaxen.pdfIn PDF document text
    • https://5974293.pasarantogel.com/contents/files/vixaramimog.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16138a2167c656---xufapov.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/tokinowarowutozogukupis.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/0aa134dab720843d4b5b0eba33aeb801/lamefanugun.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/96317517999.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB622 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE39 10668 bytes
SHA-256: b870a56dd1cfd7db50722fad3525da7d906ad8e54af8d19ab24c3355eba7604c
font_02_sfnt_off0000e6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BD 14052 bytes
SHA-256: 8b2b45335279256c5f00d027e53967f02c56ba7f4486d76b5b3134bbfc35d32b

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