Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a2009faa3a5921…

MALICIOUS

PDF

98.4 KB Created: 2021-06-17 19:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b70b15ec436bc51e41528b45c1e8ff3 SHA-1: c31abaf0fff501f8492da8cb5c37b37feeda22e1 SHA-256: 76a2009faa3a59213144e7ce2e0946d9bc3d53e5368172ec4f27b8092c2ea390
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a lure related to a 'Georgia firearm bill of sale' and includes numerous links to external PDFs hosted on compromised websites, indicating a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content or engaging in a scam. No scripts were extracted, but the presence of multiple compromised upload links points to a distribution mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 8

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/9c5f6faac2161d01512f38fb8641647a/bibamiris.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb7ddda33a---vitexefosuxedojomaxufu.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5f6af23bcebdb7247c12f8094891883b/kozavumoridinukab.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607df67b145ea---2783161024.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9b545ef94---tedikapuxo.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/jimanazapokajixe.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5ders0oogr40figqrttkd1lui5/27267507764.pdf
    • https://louvre.lv/res/wysiwyg/file/35709817653.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/o14epvv0q3kga4esj1ck0lo8kd/12394801769.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d7428fbfb---2546880976.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/ik3qcuj0roj60tjqtj655f70ap/28296870595.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/8cp4ui46fkpvoqjq1m30a6l4jd/96954155977.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b7e9d7ce---doribasejosur.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b60216278d5---29651422848.pdf
    • https://blindnow.com/userfiles/file/dudanojunilenewif.pdf
    • http://ebiocell.com/uploadfile/file/%5C/2021061105551678.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/7918929c26f5a6d9373d8ac80968ef03/75991820533.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=georgia+firearm+bill+of+sale
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e99.bin
59ddeee2cbfb7c074e73d6126233b6ac4da7fbcf83cd7e16b27bf1b2c1a520e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E99 4860 bytes
font_01_sfnt_off00012f22.bin
a4289a4afc899061f3ead4274a445c1e3804fe0fb56106a5735c4e14637a3a00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 12312 bytes
font_02_sfnt_off0001592d.bin
159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1592D 16140 bytes
font_03_sfnt_off00016e29.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E29 4324 bytes

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