Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fde22cf6356555…

MALICIOUS

PDF

90.4 KB Created: 2021-09-05 07:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f3db2e974a380834e2b971392692102d SHA-1: 7ec3c078be76e05bd7944703cabd4c8c2493b8d1 SHA-256: d2fde22cf635655579ee590cd6179d366b0c5cb7f7262a5891eac367120bdf85
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to various domains, some of which appear to be compromised or disposable hosting. The presence of a 'download button' lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://perfekttorun.pl/pliki/potevisumamofexenavipod.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611993719d6db---rujatijubowesovowukak.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/gakeropomewimolatis.pdfIn PDF document text
    • http://hnc2.com/userfiles/file/97614368488.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161220233ba421---62069355062.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/ravidep.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/lo1g2p2s30l85nlo4f6jgs7253/bosowigedoluzaxekotipu.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/38429710483.pdfIn PDF document text
    • http://drironcat.com/images/file/85756284686.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/91594940161.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/juwojidademebe.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/66fb9cddce64bc0e69b075193c5276bc/73046078253.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/17/file/99917072210.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/7evaearab8v9mrlv68jh12kenc/47589160778.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/3a28038c2ec68d17935d8c8f3e70303f/difivib.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/60102975222.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/12349740262.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/dolepuvuxag.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/62142853707.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/lotusujozijibejuvu.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094db7531677---mobivavinewazagigenofam.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982eb779853---ronapojafojiw.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2416efcc0---dawisedowaso.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/pbe2lnubk6ssdooms8hac43umi/69358959617.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/32559201131.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ignou+sociology+pdf+free+downloadPDF 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_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 10948 bytes
SHA-256: 253546533275ba335d63e6f1648e7b5091e87190ccbcef3cc89baf7561ecf88c
font_01_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 16060 bytes
SHA-256: 64af0185a2beffa7382febdf957b2ddd2015d3985e5bc97cf8ad64f3c2914973
font_02_sfnt_off00010c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C29 20876 bytes
SHA-256: e3c7a897498ab620451db3c81dc6eec4ef7addef0a163af77cca615019531490
font_03_sfnt_off000142c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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