Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd68122a9ac93388…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 23:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: e748fbad034f6b3361e4a54805cd0e82 SHA-1: 24e873a2dfe634b7b693dbd8e9ed83aba80dd2be SHA-256: cd68122a9ac93388c21dd41aa7a683013b2eac6ef58089bff3a96c43a0b58e1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised websites, indicating it functions as a link farm to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to download further malware or engage in phishing. The presence of multiple compromised CMS upload links reinforces the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dba381730---50259625053.pdf In PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ecoeau7d1dha1e57e70mrn6lhd/55543985116.pdfIn PDF document text
    • https://aneri12.eu/res/file/81190362609.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/5ggtnipne5gpg9h9f040593957/5325369265.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/f589a9de0ccc23295859ba18aa27f050/xorasanejetusevudiwudi.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/aa607695f8d96575a2d34e1d244f87d8/kexiburubeb.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c4d6770a---viveg.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/bufali.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ggbobbdjukmjhvkthh476iqe62/fonanadoniwogavi.pdfIn PDF document text
    • http://asustainable.com/global/file/90467043038.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/46454693887.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c1d41a5346b5d3006cc83eb65462ff13/gitemoduxubaxodum.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/lawulegej.pdfIn PDF document text
    • http://atraba-holding.com/userfiles/file/68031547819.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/v1cnv8gji57viffqp7d9slb786/33800833445.pdfIn PDF document text
    • https://mfdesign.hu/files/file/kajurigarelenabimadug.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/8u5r2p4bsg9dn9ooqkia7jham6/56335561624.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/57366324343.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c48099b1c---37346377280.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/ba1bcb3fb1b59e6fed776be3689ca1e4/lupepazezodu.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/112638c021e66872eaa8a4d2a779992b/dawiwovobonixalamunug.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/c158919c6076c6b389f5380c9b15b825/37355672251.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a360dcbc728---setifevivopasiwave.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/jowijogigedezuxaretuwoj.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/91750154321.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+law+of+supply+states+that+there+isPDF 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_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 17256 bytes
SHA-256: 104d624335a60d76f37cd53b04ddd21ba9bc51d014ee0444005c858ab51ad1c2
font_01_sfnt_off00011992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11992 10612 bytes
SHA-256: 6b782586732d9cc9e9baca28d12d0aa09b49bc86c1f2906ab9a8b35a7c98202b
font_02_sfnt_off0001321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1