Malicious PDF — malware analysis report

Static analysis result for SHA-256 16b9426a0f7d4952…

MALICIOUS

PDF

104.4 KB Created: 2021-07-02 02:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: bdc917d622a251aed767082f13eb8f45 SHA-1: 37f7e08d40223ec46e1808e6d2f88d530f734155 SHA-256: 16b9426a0f7d49527d84c02c2db61c0e9b0310b1d414b5938a19f50fd5ebce0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely to distribute further malware or phishing content. The presence of external URIs and link farms suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://drafthe.ru/uplcv?utm_term=recent+ielts+exam+questions+with+answers PDF link annotation
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a337b6cbe95---kobimisumojonupav.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/1f7d90322865bbeee4b136224a00039c/74114612874.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/t4a31crd2akttl9g4981jt9m14/gupavizumenimas.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202107012335191428.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/7eeb7da9f591e56c098fac0515f36546/xogifujoparepesar.pdfIn PDF document text
    • https://invest.pl/userfiles/file/seluvuxijimipepopopakuxiv.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d026b7ea9e---fadazepul.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/3930de930bc85b91a6379387a0eb3d00/pimobagi.pdfIn PDF document text
    • http://statsale.com/data/upload/ck/files/86545896329.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcca994eac0---giremavoveludarinimiraba.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/38536187188.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aab954dafb---jisagodemozilibo.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/64615771780.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/2242919705.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/b8adac6834aa2cb0f3e3f74a4c155ed9/nuwirakozid.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9c7ecb9c7---pifomitozus.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/61fbb6b72a4ad35e98bd0a089094a06b/47400794132.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8def0b3b5---domovisojinatix.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160761708e6679---43774530607.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/27f793a471fd476abe04f82d9577feab/januruxisa.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0632ded1ceac52943f9aba0cf9887157/78755700406.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_off00013755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13755 16128 bytes
SHA-256: 6f328e110d0d0f070d2febbe27ce45819550ba8e0a0282b5b9b7491185e89a9e
font_01_sfnt_off00016113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16113 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001792a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1792A 10972 bytes
SHA-256: 681e8dde47cafae497b5657419975b2f391ffe358523ff4121507ed79044fe9a

Open this report in the interactive analyzer, or submit your own file for analysis.