Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7ee7b2d0cbbc62…

MALICIOUS

PDF

88.3 KB Created: 2021-09-09 06:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3f9df16f3345d9d95e28f08ceec2b1a0 SHA-1: fa0c843fcd92ed5b9a2c5de464ff8fb7587e2c6e SHA-256: 7e7ee7b2d0cbbc62585ad1d514bf5e66a6ae994a7162664da9f0cdeaf6a4f14e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of link farming and abuse of legitimate sites. The embedded JavaScript, combined with these link farms, suggests an attempt to redirect users to malicious content or phishing pages, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=best+javascript+ide+for+android PDF link annotation
    • http://rancholasmonturaspremios.com/campannas/file/9488845884.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16135c20fc7e4e---65273282465.pdfIn PDF document text
    • https://luckyfood.itweald.com/uploads/files/61395ca54da09.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/rurivivixarugufeve.pdfIn PDF document text
    • http://aquatherm-graz.at/files/98342491470.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/wofusajarediluzalafesirip.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/5227516321.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b9bdbbce5471e3ff283ff54e843e0e32/logupofalugifarez.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/boxurepojanaxone.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/84676881597.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/59700099545.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/novavuvesegegudide.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/mapumavetobuxoge.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/44318139734.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/sitisisavobenuboxagorose.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/dadurix.pdfIn PDF document text
    • http://thefarmatarapahoecounty.com/userimages/97043862973.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/82197377995.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/18619546420.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/e4f1ca11a6fae79e127d6e9667b5d7f0/rusujurikakuraje.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/defepisudoridogopibes.pdfIn PDF document text
    • http://stylekd.ru/files/11537195812.pdfIn PDF document text
    • http://tochuchoinghi.org/files/84774853097.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/bidetenojaxiw.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/85651936585.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/94509739472.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/29118529226.pdfIn PDF document text
    • 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_off0000f09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF09A 10816 bytes
SHA-256: b53c970c9cb8704d674adc208471f19d1e741976f4b686ba22a816e720b9997c
font_01_sfnt_off000109b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B5 19164 bytes
SHA-256: c9582b2fb4d282a4162eea0af34106befd0e4154cf85d48e10edb3a594a88777
font_02_sfnt_off00013b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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