Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b8bf6dbed7d908…

MALICIOUS

PDF

68.5 KB Created: 2021-09-24 15:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de8f1308ca320a9b36a57fe545705fb0 SHA-1: be8d982d7329a78ae65de742280a4bc6527eefd3 SHA-256: 95b8bf6dbed7d908e2a9bafe2bebcf231a645f718716dbfedfce54c67310691b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a link farm pointing to various domains, many of which are likely compromised WordPress sites, suggesting an attempt to host or distribute further malicious content. The document's structure and the presence of numerous external links indicate a phishing or credential harvesting attempt, likely leading to a secondary download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://vialivonica.eu/userfiles/files/rizexamawetosamudutoraf.pdf In PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137db4f59879---95733005181.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140618029f1a---toxesamibuzatel.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/sanonapud.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/zupodepubewototejurobed.pdfIn PDF document text
    • http://nyitotthaz.hu/userfiles/files/najixugegetefuzamod.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/45259258974.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/milavamegaj.pdfIn PDF document text
    • http://chikatere.com/Upload/files/29319356308.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/bowinoto.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/93441381499.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/zevozukeveraduwipulepix.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613946d998e22---46050481399.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///toditofegivejasebopavaboz.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/daxagetumumevomulolewata.pdfIn PDF document text
    • http://mail.teleserviciomalaga.com/ckfinder/userfiles/files/kiletezib.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/8553261963.pdfIn PDF document text
    • https://premium-house.uz/images/file/gakaxiloliluvakoxubetap.pdfIn PDF document text
    • https://h016s5or78-du3.com/contents/files/jukine.pdfIn PDF document text
    • http://clinivetmadonnadirosa.eu/userfiles/files/28813496614.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/gekaboke.pdfIn PDF document text
    • https://sharenkon.com/files/vimegeriguwemoraberewuz.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/14924389510.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=the+flash+season+7+episode+3+online+freePDF link annotation
    • 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_off0000af06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF06 14616 bytes
SHA-256: 6c3862ed452fcbb05fda5d6ff24749721b97eb8cae1312e3482e65f70802ec55
font_01_sfnt_off0000d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A3 10680 bytes
SHA-256: 6fe60b70ec850a907fe37fdd7b5237bbd75d4a7380daa1e19977e3fde7d05ff4
font_02_sfnt_off0000ec16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1