Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e944ede1726e82…

MALICIOUS

PDF

107.3 KB Created: 2021-08-27 10:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9884973f9155b245c0bca573876c9839 SHA-1: b7932e0b6547b1b242854c3198e722cf0a63f4a5 SHA-256: 07e944ede1726e82e4d72f2ea7b96ab8533776e3f6ef3e930e48c24e331c8436
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating it functions as a link farm, directing users to various external websites, some of which are hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of an IP address literal in a URI further supports the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tianfonmm.com/d/files/74804491344.pdf In PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/12650323232.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb241b576f---pelemomobiregev.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/nifizavivawededele.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b0b40c1c400f1e26fa2f865caab0b878/71978124063.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/39453125071.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e0135e33a---begetejepoxoliwalikepi.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/85486681023.pdfIn PDF document text
    • https://adikkedua.com/contents//files/nesitisafuvobibufasosuma.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/58a22786daeaa9d521a65e8db5296e9d.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/xiselima.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/67260463632.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/16865827790.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/894224169.pdfPDF link annotation
    • http://gramercy-grand.ru/files/file/wagemoturavimipab.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd65dc859d---xokaruz.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/58729684913.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ro2mg48a43uf4ekrfnuubhiims/20058702308.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/tamuzopifiburejolajijasa.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/66139272564.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/77845957314.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa4511c2fc7---watafifigi.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdc75af0d5---muvorogotefeliloxanejugo.pdfIn PDF document text
    • http://avistravel.ro/userfiles/file/waxavitukaluwi.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1d6d719ddd9ebbf323292f27f3b3b1ab/57229746033.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/tigavobutixot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=complicate+in+tagalogPDF 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_off00013db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000155c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155C7 10480 bytes
SHA-256: 2833fcbee74b1bee389c3539b3e4e5a0af199eb857ed70eb64e80bf26fa6bcb2
font_02_sfnt_off00016d8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D8D 19348 bytes
SHA-256: a7d3a840572bfd130a02f741e79e041636bf40d5bc61e00eb82efe363d0eb49a

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