Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d5f65cfa8d17c7…

MALICIOUS

PDF

88.2 KB Created: 2021-06-27 20:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7dedc731f79f7948439669cebc0c2c2f SHA-1: e983764b2d39135c7bb07ebff09629d5ee4977a8 SHA-256: c0d5f65cfa8d17c7bc7d3a530a5e47035336dd4ab2b5ac0673ceb9319903efbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. No scripts were extracted, but the PDF structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://doo-san.com/userfiles/file/20210618025723.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/18331897389.pdf
    • http://atthaya.com/file_media/file_image/file/genemogojosaxasivebetixex.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/38483667d30af9388128d4203e5b9774/nononuruvatudutelijipu.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae990c4af---beredaxokin.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/846d6881b2139be8a395481b390f190a/sesufenelavuvuv.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/r13vm84lkqsre81ev6r43gsiu7/matidapi.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85b14ea147---pivuregidetudo.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701a0656239---kotopiwo.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f53aa9122---39930191835.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d76eb29996f---pudidelisuwemokapo.pdf
    • https://twfern.org/upload/ckfinder_temp/files/20210528011524.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/e21ae3cd6e1059cec109b54b4c32daab/69564388109.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f7bab0c6---66342606935.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/lepakalizasab.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d33281bdf7---63036152592.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/96f3d18f62531f799ade2f51e637c143/80045752181.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a70b91412---85930136597.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/8f533224d8e8c5876810a019661b30a2/fulejedaj.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/natekotedododij.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2af6484ebf---55928987075.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/e2bqlgepgfaei8ga8aed9u00nb/3408668940.pdf
    • http://co-mit.com/uploads/files/bonibutaxof.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+supreme+court+case+established+judicial+review
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BB 16792 bytes
font_01_sfnt_off00010ecd.bin
d1ea34cddb97d8bb3a71d3622398de4025554cd56ed7f803ae90f7102cf9cfa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16292 bytes
font_02_sfnt_off0001391e.bin
8128a137b18b5e3459cf5291310b35b30bee25a6c67d1266c5234522c1946c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1391E 11188 bytes

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