Malicious PDF — malware analysis report

Static analysis result for SHA-256 1064f350c40977a8…

MALICIOUS

PDF

102.5 KB Created: 2021-06-29 22:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d02a32608339f2ca79f9ea96feed651f SHA-1: 7838df832cfe6d7ac4ea03c974d17e7c3a5f647f SHA-256: 1064f350c40977a8b489a8122778c296c0ee6316efa9d962e099c562cf169105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress uploads and other domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 http://massageindex.nl/images/uploads/90167065924.pdf
    • http://brandnewgoods.net/userfiles/file/95072602227.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819e7dcc53b---38965748389.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/21e0df532f3b314c07f54116364b911c/barososamigit.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/58d7b55326fef0b2159e1ac845f3b3b9/puwobo.pdf
    • http://babywagen24.de/userfiles/file/6797591415.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/04iut9b6kodthqeod8p85vth6a/62618943744.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/6b6614f2109149ac469f5dec022d0049/50056547383.pdf
    • http://hzdsbg.com/uploadfile/1621426727.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/ebf98b3e1b044f017084e12ec4a33dd2/31543914992.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c880046b8aa---tofirukibuwixonujubuz.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/merulawonikugi.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-26/20210526213103263208.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/4097ton6unapj4bke8upi7n6u7/52399413075.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/e208fb84d2de1df56e729dd0c789ac34/85946952651.pdf
    • https://etadelloro.it/images/file/zovifuzivusubijizufo.pdf
    • http://sahamit.net/userfiles/file/77170300115.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/32ko17nbsnis845i3d8etbadn3/57061417576.pdf
    • http://thessalonikiflights.com/files/files/19807037194.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/jo41re4pgctsq989p7jc6cvrbo/fopejogavak.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160acf659c3bbe---dufatuwaju.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5107b4cfe0---jamujusubarabimogek.pdf
    • https://vasantviharproperties.com/userfiles/file/64647905876.pdf
    • https://kermoulin.com/userfiles/file/lepidikixam.pdf
    • http://aaaexpressheating.com/userfiles/file/66553245342.pdf
    • http://bogelaipigeon.com/upload/file/sokelenajubi.pdf
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/85121841847.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=ice+breakers+for+virtual+meetings+with+students
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113d4.bin
faacae8fe376b8e8cd804ad2503d9bdadc77a3e0fa57e789bfe6eb8adc5392af
pdf-font-stream PDF embedded font (sfnt) at offset 0x113D4 11356 bytes
font_01_sfnt_off00012e41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E41 16792 bytes
font_02_sfnt_off00014653.bin
05accb5f0dacaf8975805a344471e8df53ab0ca3ad27abb1ce6b327d87581cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x14653 17628 bytes
font_03_sfnt_off00017462.bin
6e37b2d9c54e408dbc0dba50175c5081b11f047e078f6d288c21b00991b8df25
pdf-font-stream PDF embedded font (sfnt) at offset 0x17462 16864 bytes