Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f2d6e281d807cf…

MALICIOUS

PDF

106.4 KB Created: 2021-09-18 18:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 442568f80aacfcbac42bf90a114b7f01 SHA-1: 68472a110d9d0280e3152b5ad1d1c303cce377e8 SHA-256: 82f2d6e281d807cf6012d872789089dc72f0a0e8d44368dcf13d2242d4339f1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://drafthe.ru/uplcv?utm_term=hercules+1997+full+movie+online PDF link annotation
    • http://ventexevent.se/uploads/file/mepukefofogipolokiwil.pdfIn PDF document text
    • http://akademibt.com/resimler/files/fisobul.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/tifozolavirinesujajovaw.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb2c0e4e1---lokibirojijewapave.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/16143844920926---14560777214.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140bca87daf9---87767878530.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/33695048701.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/podusazakikofukotamug.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145e39013ec6---15988182079.pdfIn PDF document text
    • https://monamifrance.com/FileData/ckfinder/files/20210918_FE12D91D464263B0.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161367d7c22859---bagapufediwaludaju.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/libiludoxuvogalat.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/37654700500.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/13994846104.pdfIn PDF document text
    • http://zgic.ru/!upload/files/61295354590.pdfIn PDF document text
    • http://szermgrt.hu/uploads/ckfinder/userfiles/files/81416044519.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161440538a8a42---44529939245.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/sosovewit.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/wekojopekigi.pdfIn PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/27647264718.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/25559702329.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/xuvozebawuminetezaterew.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/7322624418.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210913_EB68E1B56291E353.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/67417332069.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_off000137ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15011 19892 bytes
SHA-256: 22f69d08ab5361e9191a81c5daacb025642bb2ca6b148a4ecc709e0066a15037
font_02_sfnt_off00018360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18360 10664 bytes
SHA-256: c89b29e028b7d3f3a9f00578781596e2e45998573ce1f59b6e24cbc9a854232e

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