Malicious PDF — malware analysis report

Static analysis result for SHA-256 5346ce469028d3e6…

MALICIOUS

PDF

89.3 KB Created: 2021-07-28 03:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 17da39938b082d73ae78cf5652aca072 SHA-1: ac24627c8426cf2c8954df68bfe8219dc83d827b SHA-256: 5346ce469028d3e6e65635cdc62137c05fb0432cc3c11f73845efc9f6f1dcbe3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS upload directories. This suggests the PDF is likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://cr2tek.com/userfiles/Proj_Name//files/88024129737.pdf In PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/cb2225533ebb9b1e09ed6d573b2899e8/jikojisudigiv.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/belup.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/zatutuxasuferininodu.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/fc893dd4b181f47131be8c1358a2c624/fimupipugojikesarujup.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bbpmfn9biif38tnchqn3s17rut/vuwofedob.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23d0ed57f---mugelo.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc63881138d---10812926957.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160859dee7d201---81369389151.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/o1s0lkudn7plllcpf4pknr6jh3/60375128430.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/53880554577.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd56cbdb7a---50689172349.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/304578415.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25e7518e5---xifodedebezefixodadux.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/fukupumotufitorexutu.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/44645965384.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/kugopavazegozigofi.pdfIn PDF document text
    • https://oteaexpert.fr/cite_imgs/file/ximatidivibi.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095efa88e00b---50349379657.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b80fd250c57---92167792780.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/urhvggtbd0r4ufjpe3t3mlj282/dodatepuwelusixopo.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/65562211909.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/8sced1t69qgvvnvc36l6omd151/xedevetenedasigefopof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=anandamanandamaye+telugu+full+movie+download+movierulzPDF 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_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 17256 bytes
SHA-256: 8e4180d31d5beb39a84e7dec772527d11c73a0a4d27b937ba90221c4eb2fefa3
font_01_sfnt_off0001257e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D95 10936 bytes
SHA-256: 1c5084136f12199f314a37855555023f137f7d85d2b24d2b90e7dd4a42a7513d

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