Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0eb3d7524391d7…

MALICIOUS

PDF

85.5 KB Created: 2021-07-02 02:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9bcf9a2f1af9270885d7f440f93d0a38 SHA-1: a1cfaeb814e28816ec454b397fa52a1488862717 SHA-256: 4a0eb3d7524391d7ec36ca29877ae3cd290433dcc7af096ee4d84d27b3716c52
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to lure users into phishing sites or download further malware. The document body is heavily obfuscated and unreadable, providing no direct content clues beyond its structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://pixomot.ru/uplcv?utm_term=pubs+serving+food+near+me PDF link annotation
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afe873f019f---gukafawezojudejixa.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8a29660acd9d6f82e47d76150936d462/8923571961.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8b333c4a---papikenutogojunazivunuw.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c93edd81209---50007935834.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/54f022bccd3efe134e903b6c8e4e5d7c/riladekalizude.pdfIn PDF document text
    • http://airetechservices.com/userfiles/files/6780926784.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/61644783532.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/rjtuor33i0elsujrik42g66s8s/revawibibodekowo.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/u27ub4at0m4e9ir5j9segnec48/wononomonokonidigin.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9c10cb2ef---64651764996.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609857a3e5703---taluwozetazudaxabe.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f80daf25c2---60570515167.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/wepajuli.pdfIn PDF document text
    • http://szpk.hu/_user/file/tezobatulitozaxovade.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/xenuvirixoxavoxumekepaf.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/crhbp85vjs78rsdd951pgb687s/nanibigatej.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/tajejobus.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/moguzosag.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/rimovetoxo.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/9286698242.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/9246183811.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/654dca123043ee79d579d33e9e3729c3/tikofoputopop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7E 10860 bytes
SHA-256: 99debbf54becdf9646f720aa37337cbf07080dcb1303171f156a6e9ac12dcb25
font_01_sfnt_off00010362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 16920 bytes
SHA-256: ce311e2dc1953293f53c4792295a71080bd34a8de181e4cd7e8833889a62c6fd

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