Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8dc2d84061d3195…

MALICIOUS

PDF

67.6 KB Created: 2021-09-29 02:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8986f8cd063b3e4824c3d437c953ed7b SHA-1: 916f0d650942efe5884ad7583fdb1d28fbd75888 SHA-256: d8dc2d84061d3195d4a562492c37e297056ad3d28489d62068db0db708608946
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The ML classifier and ClamAV detection strongly indicate malicious intent. The document likely attempts to redirect the user to a malicious site via the embedded URL, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://coretry.ru/uplcv?utm_term=can+you+lie+down+a+fridge PDF link annotation
    • https://gulf-rope.com/images/bulk_images/files/zamutufixudiwegawajexibu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/15733264226.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/64438553126.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/30747225032.pdfIn PDF document text
    • https://www.baust.edu.bd/app/webroot/ckfinder/userfiles/files/ladunobiwedixefulirumuxul.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/vujox.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/lilelukemizikami.pdfIn PDF document text
    • http://hyeminshop.com/DATA/files/38796765576.pdfIn PDF document text
    • http://progetec.org/userfiles/files/32256787844.pdfIn PDF document text
    • http://baoveantam.info/upload/files/givejizujugul.pdfIn PDF document text
    • http://www.recko.ru/ckfinder/userfiles/files/ludidamobotidibusatejoni.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/28670193741.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/vikuliwemurowidutigibem.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/99957570836.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/13944349393.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/ruxexefegevujaranufi.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/8358381154.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/ditolariw.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/fativizofu.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/161505e11e6232---wubimujegibetojiwafet.pdfIn PDF document text
    • https://mangallagn.com/images/file/57702198304.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_off0000aca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA2 14600 bytes
SHA-256: c6772284812a246bdf62891bd18a2d3836dd27e969b9ee95c7d619353c52e73f
font_01_sfnt_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 10596 bytes
SHA-256: 7f04ee4429e15cbfbc3720e3be7d1ffdb7e3fd32b8916059916a4b534dca9fa4

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