Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffbc84d58ea7687…

MALICIOUS

PDF

84.9 KB Created: 2021-08-10 13:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 345a52a938352b7a2756434dff5bfff4 SHA-1: e4a0728959ebb8f2219b355d16ac7a5f87b7fcf1 SHA-256: 0ffbc84d58ea76878b1b38eff9bed54ac5fb0efc1140a78888e44afe41ba7908
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://adabaskimerkezi.com/upload/file/92794232721.pdf In PDF document text
    • http://amindoost.ir/images/upload/files/lerorijomefusop.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608389beae0fa---12717245268.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/tokasibofiz.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/zipotididebunarow.pdfIn PDF document text
    • http://voijin.com/userfiles/files/sonibemanoxonukosisarujom.pdfIn PDF document text
    • http://novichiha.ru/pic/file/65857796225.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/31019014004.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/80688009582.pdfIn PDF document text
    • http://beepost.vn/upload/userfiles/files/27667293377.pdfIn PDF document text
    • http://zae.me/datafiles/file/fadekuvaxire.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/ranikibo.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f93cd55618---disusud.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/virariwasobexe.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/386b2d5453090f5e91127ab2c337a1f0/38803227860.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071be8080f36---pijuj.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/zofibilozixana.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/sakarolonosida.pdfIn PDF document text
    • https://parc-hotel.info/file/86300928830.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/dovarowivutev.pdfIn PDF document text
    • http://didula.com/img/file/26689270379.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/752a4c8d35562ccdee837aaf8d25a46d/gavujevunidopudexiveku.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad34158407---kibiwazudurukukiko.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/podezagiwasar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=is+there+a+blue+german+shepherdPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 10816 bytes
SHA-256: ab9d540188606da89534bd0f87ab2a449b251cc272d1986dbd9f55c487844d06
font_01_sfnt_off00010110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 17588 bytes
SHA-256: 3ef927d4d15d4e7040d3d8de08a8abdadf0f8511fa50f442d787cb913904e524
font_02_sfnt_off00012dd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1