Malicious PDF — malware analysis report

Static analysis result for SHA-256 120ae8b01ce80ba7…

MALICIOUS

PDF

87.6 KB Created: 2021-09-07 22:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b7d0ebaebedf5f4d029548e53db5e14f SHA-1: 6de97b77c7c7fe96dd3e1b74a545772b2717b654 SHA-256: 120ae8b01ce80ba7c134781696731d369c7041217d4425bbe4732f216f66e13c
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The primary purpose appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://krisoc.ru/uplcv?utm_term=fruit+loop+tutorial+pdf PDF link annotation
    • http://eshop-kocicinadeje.cz/files/file/15956830468.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/movenowizo.pdfIn PDF document text
    • http://unityproductions.com/upload/files/sibusisijekitomuted.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/22242531326.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/ledogilituneluwilikolow.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/mikotedebejaguvejej.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/l5n79dsr2lqad618oae0plula1/77322156107.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/lpos5muvvfkejh30le1p81ehm7/80280044173.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/7so7a8s9i5ln0slbblrunddshb/bevun.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/64607258022.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/a2318d693373b0d15074b5e3d6d6c3bf/17894868655.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1051f299a0---soledibawewikanuletusaki.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/jonopepoxigeser.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/v3fspr4jf1korjb6vrksa8018l/76034518294.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607437a45c840---mibigoxukasolabexifoxo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c86bb94322---13988338242.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/d220f8d8f2277aa4e5abebb24e1c465c/bopokesekamemazolejek.pdfIn PDF document text
    • http://myredm.ru/uploads/file/sosebegaramokaxexabiwed.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/10572766587.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/mumesopetebovikad.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/xapaxatujinagabokijadupe.pdfIn PDF document text
    • http://bctlorraine.org//userfiles/file/tobanumatugo.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f193fe54c3b---23046370443.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 10164 bytes
SHA-256: b4f81859a183ea30eb94c843cb8ae7038142ec7f0525dc47041ea0d3ea6481c3
font_01_sfnt_off0000ef0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0B 20288 bytes
SHA-256: 48f44fc423a02b04b3b04b5ffd2fa4ba159087129451bea84fd7d0b33acd88fe
font_02_sfnt_off0001225f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225F 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_03_sfnt_off0001384d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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