Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca1463f94fd7858…

MALICIOUS

PDF

87.8 KB Created: 2021-07-26 15:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 825621c696eec7c4ff9a070ca00739a4 SHA-1: 433a08ded1fb66f78b84a104309e30f8f11b43be SHA-256: aca1463f94fd7858856e16466412f5dde9a4d5ef5169e095e02627542edebf2b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of callback phishing lures further indicates a malicious intent to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • 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.
  • 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://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/cad1dbb95496e231bf33ae2b79b9b717/70637638009.pdf
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/kamugodoregadegas.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a25ee5e10d7---38887652816.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/h44kloif542qevk090ltqk0d68/39282750531.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e0c5b03bd---72205200508.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ca825600---loragajugomuriwobakorela.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/9b1af5b83bd1e6d0bc87219bd9e9f5f3/8966805908.pdf
    • http://sahamit.net/userfiles/file/fekilepezofebunadevesu.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/ada0cf8d9582c7caa6d90445b3f00ab3/87403580108.pdf
    • http://mynigaoe.com/upload/file/20210702125140.pdf
    • http://feach.ie/images/uploads/file/rujemurawimudukujitog.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/67a6de1a1953066e19dda42bb639ceec/vufezikizamupedofapeg.pdf
    • http://tksvolga.ru/userfiles/file/lafajiwewasi.pdf
    • http://scoutpate.com/userfiles/file/10241391248.pdf
    • http://adams-gold.ru/archive/image/file/didilov.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/684c823a4c48c07b6a72fa5200bb0bf6/20468056015.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/kuzerisok.pdf
    • https://smartcirclegroup.com/userfiles/file/takumonol.pdf
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/3792711793.pdf
    • http://wrtour.com/FileData/ckfinder/files/20210611_DB1DDB1391AA5220.pdf
    • http://sosnovgeo.ru/userfiles/file/ratewapawepufafegojupep.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/6fa075339c71ac36a932baffe3b83924/39952164469.pdf
    • http://wo-kop.pl/userfiles/file/mesij.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160862b3448d62---korevumadepubiwapuwitales.pdf
    • http://bualuang101.com/backoffice/upload/files/sofesaxuvebalufo.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9de3b4c82d98e5a6eed3d2f131d510bf/fuvovutu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+switch+my+metro+phone+to+another+phone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3cc.bin
d34347eef3596da94facffd1c629457d97bb68791a9634096e3b311e619eecc5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 16836 bytes
font_01_sfnt_off00011fda.bin
0756da5bb0f91c1dcdbce311bb3d5dd1e6babe23011874687bf63b7489ae029f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDA 10784 bytes
font_02_sfnt_off00013897.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13897 16792 bytes