Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7fd46f8cb617d7…

MALICIOUS

PDF

108.2 KB Created: 2021-08-01 06:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 7a04326785736bce9bde9769b1e89ce0 SHA-1: 9129c5e282d1c7e9bdf36ca89b0d8ee97df872a0 SHA-256: cd7fd46f8cb617d71842c0bc356a8d71dbf45390769976da3c9d06e6b547cf69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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://canvangdientu.com/images/file/87292522968.pdf In PDF document text
    • http://tgtech-auto.com/userfiles/file/betewonos.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/85571593714.pdfIn PDF document text
    • http://dogninja.com/userfiles/files/70694473205.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a17c8f7bf---lerejokurozifilijilelu.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebae0a1573---gomirowadarugumalo.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/212743b7bb448286e988b82710b3b8af/33922010611.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e29a343bb517447bb86e1f2649ae061e/damasujiraxipukuxab.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094238430c62---59558295559.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/rosotab.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/94baa26adcfa07fd8e6a2d416fc2bbb0/20931112358.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/54804569643.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/25244386443.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bef41c8a97---teros.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/29932665101.pdfIn PDF document text
    • https://navliecky.net/userfiles/file/dokulisizajazexuxonom.pdfIn PDF document text
    • http://abnicum.ru/files/file/somol.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989667965af---puziruliziketugolek.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a9c60683e8c2b8d8aae22482350f45e6/gexazebuwobezaruvutonexi.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c9cdd0545---jimatapevatoza.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/45bfe9148f60fd16e4eecef0919caced/nirusuroko.pdfIn PDF document text
    • http://ylpcl.com/ckfinder/userfiles/files/69124854417.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/84253789428.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf207e45ad6---jiwowoxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=roblox+jailbreak+quiz+diva+answers+2021PDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001330b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1330B 29724 bytes
SHA-256: a70f61ecad4811ea898602cadd229644f9230db9a48faeaa06456280912f7c18
font_00_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 11404 bytes
SHA-256: f83c364d3679c37b7f857322157828497d22f2d9708429ea879bb9df329874bf
font_01_sfnt_off00011afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001679a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1679A 2252 bytes
SHA-256: f6a9165ff81fcac992ebfa574775dc691d9a294a62bbcabde252cb460826c8af
font_04_sfnt_off00017193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17193 19276 bytes
SHA-256: b445ca5c86267640a765c23976a7197bcb60e60b9e2380c42dd4af1fb085bb9c

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