Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f0c3a9983a12df…

MALICIOUS

PDF

70.1 KB Created: 2021-07-08 02:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eed55e44d00cd566a8fae2a5ff505b64 SHA-1: 84bf8b493f1667788de2a9d0b31d0f2cfa98b923 SHA-256: 08f0c3a9983a12df83ff4e5900253e5d46b0dcc12357d4e67b9bbcf5028c448d
176 Risk Score

Malware Insights

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

This PDF 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 embedded URIs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content or further infection vectors. The presence of external URIs and compromised CMS links points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086040c0ef31---68975653641.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c21fdddb02c---xunosizunalimovuzojere.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/0hg4n6s3dkam1rnjbchejqv8ta/bebilukorokovudusiv.pdf
    • http://allamericannursing.com/userfiles/file/13423599994.pdf
    • http://www.euro-fly.eu/userfiles/files/15979828913.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/7f115b5d24ece2b424a6ddf8cd0fdf77/78028360390.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/i1kpbu8ighbpddgn8e23altc42/91375124709.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/c16e1308db03f677f57244caa1a9a66d/68742626045.pdf
    • http://jhroseclassof77.com/clients/45984/File/pufibuxetazinoxiv.pdf
    • http://laclonghotel.vn/upload/files/zuturesaxazuvenola.pdf
    • http://envigest.cz/upload/file/jigofiremipifal.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/581efbbe41f61de4852607bcbd40c8b4/15566505556.pdf
    • https://nabsangram.com/userfiles/file/96338721519.pdf
    • http://nousgarage.com/userfiles/file/vedulaxogirafojuja.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f07f591f07---likovopovozarod.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/098c8eb331395faa7226a3bba7a92abd/16345269209.pdf
    • http://asbufestival.com/uploads/FCK_files/file/gorunilopatepidog.pdf
    • http://astro2sphere.com/admin/images/file/46085300238.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608463b8af92a---45959177682.pdf
    • http://grafiport.com/userfiles/file/lifozuxagugotebowekosijik.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e065d6bb89---bovewaroporaxabejuxag.pdf
    • http://dolphinegypt.net/userfiles/file/sosimozuwolesunivojadaf.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5af864fe45---remuze.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=symptoms+of+narcissistic+abuse
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3ad.bin
662b145eb32a5e7e29f1dc9149470f673e6f9580f8f6eb28c823057e2df0fb1f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AD 11024 bytes
font_01_sfnt_off0000cd22.bin
41304046fb3bc4e81b9fcd0b7b851608bc693e5e989cd43b2d778d979a828ccc
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD22 14976 bytes
font_02_sfnt_off0000f333.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 16792 bytes