Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c2bacc858abcb04…

MALICIOUS

PDF

75.1 KB Created: 2021-07-16 14:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 52224af0805c2d753eaceaed85855a7f SHA-1: 9ac2477cbfc8d8e672af58a7ef276154486d7d34 SHA-256: 9c2bacc858abcb0440e279d387b6a8af7469616c9803556d2630b7e666760cbf
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm on disposable hosting further supports its use in a malicious campaign, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/xuzitaxax.pdf In PDF document text
    • http://cohensevents.com/clients/74638/File/vatexemerebituvatovijibuw.pdfIn PDF document text
    • http://short-story.ru/upload/file/kuvanejotep.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/8fd827cfabb4c7e89a097fcb99896bbb/xokekabumusixi.pdfIn PDF document text
    • http://thedreaminitiative.org/Content/Admin/uploads/files/69329056614.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/tanunonesi.pdfIn PDF document text
    • http://wf515345.tw/CKEdit/upload/files/borewipuzikinumobe.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/89490288884.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/00b706b8ae82ba5ec61cec3fda60f019/19350511520.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087162d59b14---febukavazorapebupisibine.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/xezazekikovugameb.pdfIn PDF document text
    • https://serwisnawigacji.pl/userfiles/file/lofufejuzasajoneripo.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/968fa929ba7e9ad073fe4d3641901fcc/wodegunixopamajilokatut.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091eb2ec1e86---11797379515.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/45aae66521e6443c10b7165a0f543acb/15126799741.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075df479d1ee---2868164523.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f95956ec1f---gabixo.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/52436602721.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b754e94a3ea---41529515867.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d59865c5a---lapegibizonenugar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=mission+impossible+tv+series+torrentPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD876 17908 bytes
SHA-256: f96795b4c588c2bbd569c5f1c1455be92573e3ed1c4ac8239a6a8a4b2c7a591f
font_02_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 10448 bytes
SHA-256: 7288dc3a8550ffc33da2a50a05f20ad67a7d3afb82b8529ee2675373c7a511d9

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