Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6067cfa4eff8257…

MALICIOUS

PDF

72.5 KB Created: 2021-09-05 09:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c6fb1d774d4d1882b23a397cf2c8dcd SHA-1: e60391a8b7c8e066d55c86d07555a93df4033fd1 SHA-256: b6067cfa4eff82574d44af9e7bcd0c131cfe52e4e6bc8f585def865667dbbea8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains. The presence of a link to 'artistalexanderkanevskywinnerinternationalaward.com' and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, indicating an attempt to hide its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://smidgel.ru/uplcv?utm_term=euclidean+algorithm+proof+pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608544e02ae12---meliditetij.pdf
    • http://cnc-soustruzeni.cz/files/file/95666755475.pdf
    • http://dentistturkey.com/image/files/mokoroxuvedogomudof.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c748ffe8dce32e27e525a5ea0d44756d/40022820634.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/6bb5ae7cc2841dec85cbd707dc34fbc6/6987875186.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/c737024a94f496fcf1aea57be7ed0652/94444316701.pdf
    • http://career-id.org/ckfinder/userfiles/files/sukukefiz.pdf
    • https://myphi.biz/nbloom/fckuploads/file/41357366701.pdf
    • http://www.gamylai.vn/uploads/files/34043812057.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdc88ec41d---xenorifukixupuzojejorumet.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf4ec8b690---zadebojabijazaralijuw.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/2aeecca8018efb181b8c5689d24e1bb2/96692211800.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/bue7e28q67rukefj211k3sn5t2/63481006587.pdf
    • http://dvif.fr/userfiles/file/ruruwuvedisasuk.pdf
    • http://dentherapia.hu/files/file/vadowaruzijige.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/aa3403ea2d4050d9d2d66a2d4b48fbb7/95520430738.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/04904db3f3c8469bb1f487bbe3756223/25413975477.pdf
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/xufadusogumavagikow.pdf
    • http://proreferee.ru/uploads/ckfinder/files/19583309518.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/1min7d8oi0eo6fodubdvosfqd0/50677356309.pdf
    • http://sieuthihatgiong.vn/webroot/img/files/wibotaxulupef.pdf
    • http://kdekdyjak.cz/data/71715320619.pdf
    • http://sklepjola.pl/userfiles/file/3906385898.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/7f862dbf549d7741e3ed22fc3bb7d1f5/zezezanak.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160924f4eae664---xuxozem.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/ledemajugidejawanativul.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba00.bin
af006136b06d93bb6950fd2a392a0ae02cda3e7572e2dba5c0576653d1f58f3f
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA00 10980 bytes
font_01_sfnt_off0000d30d.bin
afef2ba845a24ca6acb771a92c5a78c284b14bc3a06ba43651bae8df854af6e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD30D 16312 bytes
font_02_sfnt_off0000fd42.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD42 16792 bytes