Malicious PDF — malware analysis report

Static analysis result for SHA-256 68af8c8493b74ba2…

MALICIOUS

PDF

91.8 KB Created: 2021-09-01 13:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7f1d495b3240e79b45ca02ed883d5333 SHA-1: d961bd35a53d8fb563d46014e811401f0ec7c459 SHA-256: 68af8c8493b74ba220092c80746249c50c82bf7c5eef400cbcdc00b8748b134e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure as a link farm on disposable hosting further supports its use as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://garglob.ru/uplcv?utm_term=carrot+puree+for+baby+5+months PDF link annotation
    • https://webshopplus.nl/app/webroot/files/userfiles/files/tagezuripipimetitex.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaec14f8f8---9695084784.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/1fa331f8c6bb7331187058ebfe8470b9/jukimoroteja.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/36144464964.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bd341b5749586dafe6648f586ae78858/kagolitav.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/50738126934.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3618ee447---88821328750.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/88190636632.pdfIn PDF document text
    • https://aashianarealty.com/file/repuwofoperasevukaximer.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/37531533062.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/11092750655.pdfIn PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/10281901580.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/26334390190.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/lupatubuvedevonegeje.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4bccdb0645---88987825499.pdfIn PDF document text
    • http://landpas.pl/upload/file/28260858843.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ohks0ldd6j6qd1bhh6fptjj615/7928502886.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/4c04ca09c6054f3e84e416f18245ccb0/sewebugirazewaxe.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b27a08f0a05---kitusewunokarurajap.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/paverovewunafedixodog.pdfIn PDF document text
    • https://troypin.com/calisma2/files/uploads/96906196000.pdfIn PDF document text
    • https://ksboutlet.com/file/files/xirabijukamujabu.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/3b4b515cd51b5b3c84c1e5528961c4ff/91608345312.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ie2qsinfjs04uprihkb26g7b3f/26602029593.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bb06b745c---logezeva.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/82132621817.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/57c572c87ec7b702c453a18d30978b44/vimanufes.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_off000101e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F6 17932 bytes
SHA-256: 85f8a93137a3faac15396c4a01e0124f3d95cbbec8d827a1de4cfe25d2a22833
font_02_sfnt_off000147ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147CE 11004 bytes
SHA-256: ba892905b29a6fe801866aea5b50b99baea7101bd125a50e6aafc4056b49fc86

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