Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd0f0767cddf4a7…

MALICIOUS

PDF

80.2 KB Created: 2021-07-14 10:34:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15ae7c2825fc6f37e125514a471021b2 SHA-1: 9671b12772c3ddb04dab31ad481b9cbf0445bc78 SHA-256: 1fd0f0767cddf4a780bc7455c831e8024347aaa7d24fff75121cf3613b38324b
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and a link farm indicates a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://autoroman-service.ro/imagini_ws/23989916367.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/p6m727cm87in9ujd1p0o4dbeap/puzovovelojelaxepiginili.pdf
    • http://gphs84.com/clients/866382/File/bezesipewepoboxaluv.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/76743625562.pdf
    • http://cheumst.com/upload/fckeditor/file/niriko.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/585c1a41db9c6f6c1ef1b93ab38505ca/55272337660.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1a77a89a---mosuf.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/564nioun2q6orescgnb31klj82/47857881688.pdf
    • https://service-panev.com/userfiles/97843407688.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8b9e6d961cc9797b065e58d1919e4e6b/68101143874.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088e60e269fa---nugogitivufipuwibe.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b114ffc8615---34636273837.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/tajog.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/e8bcfdomem3pqce23hrn50n22o/jekixarurifudinazox.pdf
    • http://kientrucsangtrong.com/plus/files/duparusefugidujez.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e16af18b8b---41405936336.pdf
    • http://belst.by/upload/file/88927566644.pdf
    • http://akcjonariusz.com/UserFiles/file/534666496.pdf
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lozijifugurazegimafex.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608354b032c26---xunin.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ei2gprn13sp7tbfksk2rub8dq1/ramavoxiwapo.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8be079c6db---92819178010.pdf
    • http://albertopizzetti.it/userfiles/files/dokevibakubesidaruf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=boot+tailor+near+me
    • 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_off0000d5c4.bin
6a3a976b0c262e0b4dc5737c2aa19df4314765cc1409ac1cfb09c391c62351e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C4 10156 bytes
font_01_sfnt_off0000ec6a.bin
a0876f0eb8eaf3dbaca486ec72a9b0298cb0bc2bd51dd0419d59450ecab8b105
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6A 17996 bytes
font_02_sfnt_off00011bc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC8 16792 bytes