Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9024902c3c71de0…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 07:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 470243ac979deb86073da43ad00a8766 SHA-1: 8cacc75b9266720ea558a29a244fa219a2fba739 SHA-256: f9024902c3c71de0dbc345d2f20b6329a9d9ac217b2f7daeb96eb2fe8e058e16
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs clearly show a pattern of directing users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://drafthe.ru/uplcv?utm_term=vortex+genie+2+mixer+manual PDF link annotation
    • https://trexanh.net/upload/files/45578022208.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160996ead8b0cd---dazijupor.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/37725336830.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/vowirezeluw.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/34204099063.pdfIn PDF document text
    • https://altbuket.ru/files/lunuvujen.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3af7f2759---davoperuguzolupepiwoz.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ad2fe69d791f94f15779693a0a3f1fa0/midadazalawojutenidej.pdfIn PDF document text
    • http://www.agot.pl/upload/file/megudidap.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/dobab.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/togizepepuzilawetadepif.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/60240127819.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/watumaseferin.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/kj6p5gvdkqv33cj1apfs30vk65/49625600103.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/17683543071.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/5n48fjkbq4peihrhaqisrk19a5/38835802882.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/xopirizovupuveko.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/13033476024.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/17351752769b9a3c1ff82bfbc3a9a765/favorab.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/navovudisev.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/4fae90aa3481dfad4bef3d564d86bed6/83152410013.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/vusepote.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a62acde21---kizefediko.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_off0000e7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CF 19420 bytes
SHA-256: a1d0ed4c30c878dc3198dc4edb6f2c520d4214449ad68040d2328a3ac80fc4a0
font_01_sfnt_off00011a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13277 10576 bytes
SHA-256: 987ab7cd4a14f79119c6944d2b130dad57f68f96f0e398ca59e81585af1e44cf

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