Malicious PDF — malware analysis report

Static analysis result for SHA-256 b917e6676d2819c9…

MALICIOUS

PDF

89.8 KB Created: 2021-08-19 13:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e4abf9d89eead9e070e3ddfba4b333a7 SHA-1: bc448a26a1402cc1318d04a291f94b3c233ab130 SHA-256: b917e6676d2819c9dc2499c2a539eeab2124ff05db9412f3dd404f5a28aac904
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm pointing to multiple compromised CMS upload directories, suggesting it's designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/7daf2a4be542b6042e8f784e1a1cc493/begijimagesuxitesixatexab.pdf In PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/lipesoliredizazijebo.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610e9741c2cf2---ligakenobamemuwesu.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/79951633612.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/1b4qvuqudqertte44vsqcoc6nj/13169050000.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/laveredasuleke.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/67129702334.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/bebanegigalir.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/b78a29d35d6b36bc6d78183747f485cd/72908203138.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/7qp3kq6urvpjq430ohv4cuq75r/dexumibofu.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608639c2968f3---bugomikixujoxogor.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/4c61f8f70213e66b330b0839ea6c8a23/93117406640.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/92319277854.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/jujomororidemuvepopo.pdfIn PDF document text
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/pejikosemexipizumopalu.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a90a2d903d1---6694840258.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/13360320356.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/xufunamabarerimol.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/37554841792.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/fajupuzovawewal.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/wubejotajijave.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f58c3efc7---kawipebuxovimafedu.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/jatipajiwirok.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/40789718504.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/89827212109.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=adverbio+e+locu%C3%A7%C3%A3o+adverbial+exercicios+7o+ano+com+gabaritoPDF link annotation
    • 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_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 11616 bytes
SHA-256: a58615cdd61dce85c53ea57ff466d92e7b6940a0486cd2e25bea22e9b1d4d27c
font_01_sfnt_off00010f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 19496 bytes
SHA-256: 87a6f3ec637f7130d819a8f7d919fd6b79c6a77fb8a85966b7742f5d88d7a081
font_02_sfnt_off00013e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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