Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf1d563f5111d47e…

MALICIOUS

PDF

90.2 KB Created: 2021-09-22 11:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: dcca5278c3c056acf7534376641d7484 SHA-1: 75e9297d1773465d37077ea06f5f9a1039cb5caa SHA-256: bf1d563f5111d47e77069120019db9e9abb84287033292fe91085a6245f1b390
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as an external URI. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of many links on disposable hosting suggests a link farm used to obscure the ultimate destination, likely a phishing page or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=can+i+watch+live+tv+on+firestick PDF link annotation
    • http://alisawedding.com/upload/users/files/98981027503.pdfIn PDF document text
    • http://mamitobe.ru/files/file/19777083687.pdfIn PDF document text
    • https://abcoegypt.com/userfiles/files/1425308995.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/34996289374.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/58178238822.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/77366959224.pdfIn PDF document text
    • https://777mto.info/contents/files/82229608075.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/28818774886.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/63074707418.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/kupixodexuxulebixepopime.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/regijamiraturetopokegatuv.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/loridusuvav.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/fevef.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417ad4c5813---fisobeviwusosabigewuw.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/towudebolejidesupopuvug.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/72461973294.pdfIn PDF document text
    • http://grabnerestriche.at/30756806829.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/60788225532.pdfIn PDF document text
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/vupewuwe.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/fugirove.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/94539442183.pdfIn PDF document text
    • https://gestionarival.com/userfiles/file/zonazodudaserirave.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/kajuxavede.pdfIn PDF document text
    • https://aitalk.vn/upload/files/zixajitajedil.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/putowo.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ac9b2b1580---daladuwivevetepofi.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_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 10708 bytes
SHA-256: bc27dc482efa6327149a22d9c167d88b1fe048c3634106d6ab8d776595b3d52d
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 19208 bytes
SHA-256: 882766a28736d6ca66a98a7aaa8250c58430fd058d20a42fe616e95ee1988f2b

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