Malicious PDF — malware analysis report

Static analysis result for SHA-256 0560f026bb422634…

MALICIOUS

PDF

169.9 KB Created: 2021-07-22 12:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 42ab16b1322a3762447d90677096c6a8 SHA-1: be0165f6becfff6b91d725d1048c3c2a77ef0f97 SHA-256: 0560f026bb422634a57223d7e1b594567318731ebbf4fe8b35f55ca7f04e3776
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised WordPress sites and other domains, likely intended to host phishing pages or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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 http://medica-eg.com/userfiles/file/selutitesefinate.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/4fed48967931e2a2b460fcdebe28514b/godofufunomufawaneguka.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/730858a7fb1fc064428212c342d7a4e9/sutikokepukekosopiwenovul.pdf
    • http://matstravel.ru/userfiles/file/wolejutomoxisazitafefafan.pdf
    • http://holidayinntorino.com/userfiles/files/70163102551.pdf
    • http://vswet.ru/f/20530194682.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987f98e915d---kuwite.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/1c7921a7810c4e60dbd10913500ca221/16088698629.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/2677eaadace2cd8e353a32c2a40652a5/9458031254.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/feaf4e3a963575dd63062c563d860bac/58951347142.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c2b81da5---55705081470.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/can6mpd1trd10n417djkbc2q0s/47357829069.pdf
    • http://sergey-yushkov.com/pict/file/polologunosuluwatopogudi.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074108b93ed5---68646424863.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e448d26ccb---59498641184.pdf
    • http://markasib.ru/ckfinder/userfiles/files/wuwipakiduzupukofapedowo.pdf
    • https://footballsod.com/images/ck-uploads/files/6228940259.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2b9095f23---powalemujukaxenowaki.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74b725f8d---21090724597.pdf
    • https://airshow-bg.com/file/93414527123.pdf
    • http://retroldn.com/userfiles/file/zoretesodarexowure.pdf
    • http://lucann.com/Upload/file/xotajupevij.pdf
    • http://apexibd.com/uploads/fck_uploads/file/1751850006.pdf
    • http://archerelectricsupply.com/userfiles/file/32427319547.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865d4766c03---bezelituki.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=to+look+alike
    • 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_off00023710.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x23710 16792 bytes
font_01_sfnt_off00024f22.bin
dc505706332ae5bba4883a9c41373d1627e4e80e9b832b63e4c2b459fd8de13e
pdf-font-stream PDF embedded font (sfnt) at offset 0x24F22 19380 bytes
font_02_sfnt_off00028144.bin
4f1803bcc065b1ffe4d895f769434cc8021d37208aab8a1d625134fa9ee8e627
pdf-font-stream PDF embedded font (sfnt) at offset 0x28144 9684 bytes