Malicious PDF — malware analysis report

Static analysis result for SHA-256 3af47893f71adaa8…

MALICIOUS

PDF

85.5 KB Created: 2021-09-06 18:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 96cfdc2d9930038b4d599c964e547070 SHA-1: e1a74b142e6daf81e63aaadd9fe4a1662bd7d6c4 SHA-256: 3af47893f71adaa87add7843c3ce19359a8f8ddaa4ee50ee7732bb376ea71e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of numerous external URIs and link farm patterns suggests an intent to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc4673dc4---63777627073.pdf In PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/pepoxapadinevizozigijaxu.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/21162087216.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210811_AA4CEF7A76BAE824.pdfIn PDF document text
    • http://mopron.ru/upload/files/69127183335.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f14b80dd77---berapalov.pdfIn PDF document text
    • https://farmstead.tw/farmstead/upload/files/69840534031.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/vulumizanema.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb26094ada0---54760033319.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/80343035867.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/99021876125.pdfIn PDF document text
    • http://eau-msu.ru/ckfinder/userfiles/files/82506561219.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d3e399bb178f433973dea1b069393c79/18010522569.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16084e1294d86e---99653696389.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d234c1e526d---tununaseben.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e557bc54d4---46219457411.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/50404173631.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/59159559159.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/40054889184.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/puxawopunawarifiwivi.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210812192645.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/galewezubezame.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/fukenolukalafaxudaripu.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/burozadelazejotes.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5205d387d---7213764856.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=nebosh+syllabus+2017+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08B 18024 bytes
SHA-256: 27d1ebbee726c143ee23e1a4eeffea83d28a6d5f1a989e93b0f8899e52e61d6d
font_01_sfnt_off0000ff06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0
font_02_sfnt_off00011697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 10876 bytes
SHA-256: 7f46eae1b6670503936bf59b37181b60641e54aabc09cbbba938b5e387380fb5

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