Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8d0a2b79a2136a8…

MALICIOUS

PDF

96.0 KB Created: 2021-07-18 23:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 38daeabdf25e049d7486786bdf614948 SHA-1: 76ed68358993e3cfe0d98f8d5601a4ea7493b6ad SHA-256: c8d0a2b79a2136a862ee4a45be10d8143c028d0c3c050aafb6809184ac22f40a
156 Risk Score

Malware Insights

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

This PDF file functions as a link farm, directing users to various external websites. Several URLs point to compromised WordPress installations and utilize disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/27888e9676a270af6fad6954344ede68/rumix.pdf In PDF document text
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/75jij8qa3pokm1b5rd5pi5k6fa/64630322729.pdfIn PDF document text
    • http://iphysiology.ru/upload/98255328439.pdfIn PDF document text
    • https://peterdegendt.be/file/papolikaligetuxo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/f6jargre2u2bppl5o0217c7pi1/wijuwelegosevorikumixaro.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/gujajuzi.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/fiwitulewozavokomexelajal.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/porepubisixogumi.pdfIn PDF document text
    • http://daydala.com/userfiles/file/79321315139.pdfIn PDF document text
    • http://sivam.pl/files/file/72832209456.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/4c7984c99cfccf5a17e19d1ed5b664ad/2648413025.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0f29477a38---bedigivirus.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/fcfab237b0606edbf4f7e22c40b9e3ac/86221296149.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/56763631837.pdfIn PDF document text
    • http://unseretochter.com/images/file/zamaduxunex.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/daob13ivffs2ein1a7ilkvblt7/28204857776.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c239aabaa---pabigetopusoxeduzikanaza.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/du6qtdciob4ukrilbeh4vj4clc/13797941831.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/75011735711.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098f81445b2c---jijinozaxokumukoxugow.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/66506236514.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160958bdd0b87d---51126188938.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/d4d4586bc743968fcbe779fc58c4cee9/53666855605.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/37713149708.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/zexomoburiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=a+textbook+of+biotechnology+by+rc+dubey+free+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 17688 bytes
SHA-256: 49c253d99f345ad77f972ff2605561cf3142412145f52cd1981bb56a91e1e2cc
font_01_sfnt_off00012ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADE 11096 bytes
SHA-256: 732d262d4113da4f22f875d9fc2a05b0cfd8379447869acb04b780e1c185e302
font_02_sfnt_off00014444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C55 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b

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