Malicious PDF — malware analysis report

Static analysis result for SHA-256 247aa6e04e21e079…

MALICIOUS

PDF

98.1 KB Created: 2021-08-02 05:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a328fb4b9039ffdb03d7fe4d110d9aa4 SHA-1: a449193943a0c753d5a0f393fdee6ce200aaa310 SHA-256: 247aa6e04e21e079c1d82ad055fd40e21f6d9430456c6adec02ded1f7cb1795e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. The document's structure and URL distribution suggest it's designed to redirect users to potentially harmful content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/2afdac0s7b85ovbhri6e7gpf84/bimajosalu.pdf In PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608781650dca4---pugalosukiv.pdfIn PDF document text
    • http://hesexpo.com/img/editor/image/file/gumubadimiluwelajibazat.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/tafaradavepejajotuk.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/72425375916.pdfIn PDF document text
    • http://campfirewtx.org/userfiles/file/pevupamodosedopixetixanar.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2459279ae---bavosulifovemarukosor.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f36b6bb52---tupogimuwobuniwewa.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/zoduti.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/64898609306.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/kutogopikapivexed.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/10110830921.pdfIn PDF document text
    • http://abnicum.com/files/file/17999140679.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/kowuludopexazuselugobez.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210529050438.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/wavesatatuzobago.pdfIn PDF document text
    • https://pindimana.in/uploads/file/94321165890.pdfIn PDF document text
    • http://sibmetiz.ru/upload_picture/41643280885.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/xekojepigokanutopaponez.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/kimobolad.pdfIn PDF document text
    • https://webmenuplus.com/images/file/darenutawefewitijo.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/65566785344.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/4432860715.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+you+reset+a+phonak+hearing+aidPDF 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_off00011837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11837 17444 bytes
SHA-256: e6ccdef237b9846cdc7c744f7f7147039993ae171987d726ca2a7903f412d5d2
font_01_sfnt_off0001460a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E21 11008 bytes
SHA-256: a582b1cc5c177772fa9418e15fd5a8327ffca6b58147fad6d79bc76889320d48

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