Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e0187211b2ea47…

MALICIOUS

PDF

77.2 KB Created: 2021-06-30 13:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 26bb5ce808077ea6e07195f5c58c3efb SHA-1: 9d46b6a8645b1d0fe4b09e3c485079c5ecd8664f SHA-256: 54e0187211b2ea47fea0e0a79cf1fb83696919e29699683d081364b5d1115060
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://irlanc.ru/uplcv?utm_term=practical+manual+in+clinical+medicine+by+abm+abdullah+pdf+download PDF link annotation
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/bd12ab26bff8cffe0c7f368c51a77f8f/47899795769.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/jjd61lq999cacao2v7ich4moou/pakodamolazoweluramu.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/69026185870.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/68829054616.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c84cb3f3ef5---zodezevebam.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/38978438273.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/k6cg54jb0ds25v9g20d3dajbri/zexuxerovopixanupe.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/54723376912.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/51239639800.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/bivozugolabelu.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/13a10e69fd250e981c740283a6f74432/tupaju.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e51397af26---52170177683.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/1a152a71915a288240d3d6a7349f8118/87530514302.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/71f4f5e814b6f794fd4037a2868cae26/15063549279.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/vaxalapovokobenixalaj.pdfIn PDF document text
    • http://hoanggiaphatland.com/uploads/image/files/fodavafozan.pdfIn PDF document text
    • http://dnepropress.net/files/file/17484830212.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/92464596519.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092dee10a4a8---96812866702.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fdae9040f---25762190564.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/2qkj7r6siv4h1oc6nuoa35qgmh/muterurariribon.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/12707027384.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a2eed237117---defijokakatibasotiribu.pdfIn PDF document text
    • https://astek-telem.fr/userfiles/file/mopopuxa.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_off0000c98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 16616 bytes
SHA-256: 77b60c20e51181ca15c00aecb7ee01d53cfd7338613e7764a7380071697c3565
font_01_sfnt_off0000f4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 11156 bytes
SHA-256: 2758f3e064613c58905879666f26206c27c0df1fe9810e8dbc2d033c5b300d67

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