Malicious PDF — malware analysis report

Static analysis result for SHA-256 f060965c38974807…

MALICIOUS

PDF

88.0 KB Created: 2021-08-12 20:14:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 203b57e07651f7a91d7da36532744b19 SHA-1: 8e5f76315e4197f8b633c4befb8d48a67d222a5c SHA-256: f060965c38974807851fc843d9582fc1024cfde4ea162c5b9f6aa8d81e7b281a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains associated with link farms and potentially compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of multiple links on disposable or compromised hosting suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pogservice.ru/userfiles/file/lenonatagapopo.pdf In PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086789c6a379---81808779563.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/zolofanulanonuw.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/pqhc63su16rg3puon3e9f1uh22/soxub.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/c87dab74b2a5efc6fff7caed8f9bea7a/zigarozofifilonodimu.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/nuxasujulamo.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/26097825967.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebca4c0ca---5799768105.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/c9a4ce9f1f1c1cdc536525e3c9e3d42f/dujifafamulewiririzivefu.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/35605696169.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/gepomifi.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/55796120709.pdfIn PDF document text
    • http://www.moyekolodin.com/files/50751480042.pdfIn PDF document text
    • https://creteservices.com/FCKeditor/userimages/file/71985796379.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/namubuxiniruz.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/jamisu.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1587e5c42---67767703612.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/33s54hesel8gl9bn5o1bq6dgaj/pilefewovunijejivukidizi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/d9319a5a9e380a120519f37b47985c09/12655130036.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607126fa9d02f---90468706934.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/soguga.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/74098332b4618011ab03d57500b1af01/96977713259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=demonstrative+pronouns+worksheets+pdf+grade+1PDF 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_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 11296 bytes
SHA-256: b6f261e0cdbd04d58885d174c20adbbae55263b6135e89d4eac4195160fd67e2
font_01_sfnt_off00010d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1B 17256 bytes
SHA-256: 1c37d90d2727e4b25cf3b328d7e13184178b4bbf7ba6d0aa437d9e8d4d453ac1
font_02_sfnt_off00013a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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