Malicious PDF — malware analysis report

Static analysis result for SHA-256 0090222d6c88763d…

MALICIOUS

PDF

91.1 KB Created: 2021-08-25 02:13:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b6c0f3b549b7734fe5e5f9ac4f83ecd SHA-1: e2f411e06bcba61d50feb13c129924ebde79f83b SHA-256: 0090222d6c88763d4ce392c559e1d55f0aa8dace324bbf9fe955e2efa6394987
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gitteszoneklinik.dk/ckfinder/userfiles/files/vasodavitafik.pdf
    • http://studiopedrazzini.eu/userfiles/files/63816871308.pdf
    • https://marblobathware.ph/app/webroot/img/files/52820750668.pdf
    • http://parzenica-bialka.pl/userfiles/files/reruzew.pdf
    • http://membranekeyboard.pl/_data/file/nisokoxetalu.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/0e8929ce859e39d7c994b7a98e66293b/83766491661.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/d26936585f76e1a78edf4389fb89b9db/satevugizuvediruluf.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/06942e1fd576050037a5edbba80a51ca/39942750524.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1edd5c4613---53569001778.pdf
    • http://stihoplet.by/upload/editor/files/xitonamegezefu.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7f4b278da---15053913538.pdf
    • http://fractinvest.com/uploads/file/wesus.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/rhp9rjacqpup522845lt929to5/koxijajawedifejolopudeve.pdf
    • http://charivne.info/images/file/15902902693.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/83tlun0jpidi4g83trqjjmeqe5/34632656858.pdf
    • https://khogiaydantuonghanquoc.com/images/news/file/sudukigimofipupi.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/25304679c3771f1859c11fad21ff1b21/18517136990.pdf
    • http://foto-video.ch/userfiles/files/nizemotidezudepefokubapiw.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/11489666776094caac12233.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s6uiepu6d0homheegb21gqbvu8/towelemimifef.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b236c219732---31045153148.pdf
    • http://connect-senior.ch/uploades/userfiles/file/15005742602.pdf
    • http://3e-machinery.ru/app/webroot/filesfiles/40129938885.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=beast+with+two+backs+meaning
    • 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_off0000f2f5.bin
3fcb4bd9a657138cd6f845c54de1d43d03ba1b55ba0a74a2c4f7e4569b531f59
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 18948 bytes
font_01_sfnt_off000122b7.bin
8f6ff29df9bd53b9fe69ee5a54e47ccb6cb58b330f264cf374df6885e030ff1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 10900 bytes
font_02_sfnt_off00013be6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE6 16792 bytes
font_03_sfnt_off000153f3.bin
79a4e392cb0fa98322e316a49c61cd7fb39e7d048edd8cd71fe027fdbf40d9e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x153F3 2216 bytes