Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76ab16b1986ab65…

MALICIOUS

PDF

83.8 KB Created: 2021-09-04 18:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2d7ce6b0a0c4ab9fae946dbb0d8b6750 SHA-1: 33eb853c3bef4ed171c3df596a970cc97c09b75d SHA-256: f76ab16b1986ab65ae379dc6680ee2a793f445400972950a2e4fabd6869c8974
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external websites, many hosted on compromised WordPress sites. The presence of external URIs and link farm heuristics suggests the document is designed to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=snooze+eatery+menu+pdf PDF link annotation
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/ccldcvdqepudea2lgt013kulss/73614175293.pdfIn PDF document text
    • http://mayfamilycircle.com/clients/5/53/53cd9f4101e72b768929e5daf979c2da/File/34306851245.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/notiburutikagaxiwegivoxab.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/u0dnvl3eve74qeanj3gicbji35/vebijafagirujivabosoxiven.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/logepujisalev.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/30523879124.pdfIn PDF document text
    • http://infosierra.es/images/editor/lafijelenanikimowe.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/fesirumoji.pdfIn PDF document text
    • http://debden.org/userfiles/file/55486277356.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8052eeaed5f1e72f5e15b79607750383/kimemedani.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e88b811cd---15199452246.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/ae16ec03d94a17f7d42f4f1545223161/nitabopuxumixuxobabo.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/beziwoda.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/vebobekisogugewusinanik.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/tefogomo.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/womidivirinizugemepu.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb10e98f59e---bupilorowezeb.pdfIn PDF document text
    • http://arslanemlak.come/file/21545047763.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/gikuninavatu.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/46380015098.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1611f88973b8cb---jivugodigulubagu.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab96bb8f40---23624130696.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4i1nq1mpu8vvjg2epgpvh820h0/87155805596.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/terupibazasizumu.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB8 10704 bytes
SHA-256: f0f439c6c27a4c8d1d580a4464dae5810f4671cc4cea570f317d2f3a4013ee8a
font_02_sfnt_off0001145f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1145F 17520 bytes
SHA-256: 9396db1a7498fb067a21403de77a052b37c2430cdc260148d72e6076d2e7121c

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