Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0c20e0a0eb313a…

MALICIOUS

PDF

79.2 KB Created: 2021-07-07 11:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 3ce92df6ea4ee054fc84a009faef9a1d SHA-1: 684f1d8dda3582316b88c8993eb2ebb3a2d38c7c SHA-256: 6f0c20e0a0eb313a44c98f60ec2f095f90d8ae0b1daa41f3a5e83941dbc0350b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://wastran.ru/uplcv?utm_term=un+manual+of+tests+and+criteria+38.3 PDF link annotation
    • http://innovad-ltd.com/userfiles/file/venuxomog.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/pujefinomewuxatix.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/kekokelimijisajagumuf.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/41516560932.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b556309f3---29228780681.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a69e325a0bb4e415687de6ac0fdf15d0/55223276568.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/28286288997.pdfIn PDF document text
    • http://zatacorp.com/upload/files/97445703.pdfIn PDF document text
    • http://nontaromclinic.com/ckfinder/userfiles/files/4245768922.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b9ed9d735f9dbdb6e8861e3522062607/bukowadagonojefixekumi.pdfIn PDF document text
    • https://sportcity.bg/webroot/img/content/files/pebiset.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/wojimegetuzutujevagesox.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/db09ba451ee9518f736dbd5f33c38f94/bolegabafufixevojakuveji.pdfIn PDF document text
    • http://steelbo.com/uploads/admins/u0/files/20210605122939.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/rawezowudumagujetexin.pdfIn PDF document text
    • https://tonitomov.com/picture/file/34452223057.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/d3cbb530f07e42c8ec08dfcc985273a8/85954828001.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a568ed425a9---53986539165.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/46526919674.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/desunonu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/ba7ad478c32aaec20ebf7630557db99d/bifaferajabivixas.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/vixekaguw.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/mnh2oui0r1ie365ndb09l5m077/rowuzojitutireronijaba.pdfIn PDF document text
    • http://peak-experience-japan.com/68121961264.pdfIn PDF document text
    • http://drironcat.com/images/file/85790702337.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 11192 bytes
SHA-256: 68c81e7662893f84d139511ccbc61b2da457b3693a2cfbe2fb5b8aabddfd2b01
font_01_sfnt_off0000ea1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 17576 bytes
SHA-256: d9cc3c6d5d8044f85cc78ce2a4da675626a1eeb47ca275b956dad18e13c07acc
font_02_sfnt_off0001172d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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