Malicious PDF — malware analysis report

Static analysis result for SHA-256 c01571db63a98c52…

MALICIOUS

PDF

83.8 KB Created: 2021-09-04 06:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2043f0ad2510e532fc67f59323a685bb SHA-1: afb4a1a56159e31226d65b72a9cfffd8ab95fe9e SHA-256: c01571db63a98c5284a77adb07cb289e5245fdc500aefb6abe2407c6c6961d16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://rotarybrescello.it/userfiles/files/kekidop.pdf In PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210624210359111.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/denufibalawerezexivagivu.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa7efc9697---lefaweliw.pdfIn PDF document text
    • https://tonitomov.com/picture/file/59231628993.pdfIn PDF document text
    • https://puppometalli.eu/file/13195805871.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/morafa.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b40a71334---1236973138.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/40947502617.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada7a91244d---53397058099.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210826071637.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/3db1bed8043c966ed428908ef191fc66/17848637801.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/97737261214.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea4d2a1b13---jinafonijoseditovuf.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/28875632468.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ea895d7b4ecce5567044d5e481940c1b/63797256077.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98fb67b03---59406622839.pdfIn PDF document text
    • http://udemadriatic.com/userfiles/files/vagarelotodolij.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/18168396166.pdfIn PDF document text
    • https://venefoil.com/ckfinder/userfiles/files/93511016551.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/84fce31d7707bf264cb5d658af10e76c/27700254080.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/38185813954.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/e1eff052e60ca88357f7df53a5f2ad92/mobizufufifuzepojegunex.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/a1005826bdfc7198dcb64194456626c6/85911844269.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a5e79b2390426345010d64893273a2de/89007364482.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/4219952210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=price+action+forex+trading+strategy+pdfPDF 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_off0000e393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 17004 bytes
SHA-256: c1fafe8cd9a5a6bd3f2f69c195996b07b84891b64fb30c31a041f8f8dcb88bc2
font_01_sfnt_off00010f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001279f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279F 10968 bytes
SHA-256: 922db60d4c9f9521ef0278775d614777038b57548f4b458772a7e55f9fedab06

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