Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee0a69ab6d530d1…

MALICIOUS

PDF

84.7 KB Created: 2021-09-09 09:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a2f5455ee98ecfcaaf576c10c2baf575 SHA-1: e78272152b9074e72e056d81494bd635a37d87ca SHA-256: 6ee0a69ab6d530d1563498608d1fd03481fa8a46c3ad456e77911ce83c8c93e8
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that likely lead to malicious content or phishing pages. The PDF's structure and embedded URLs suggest an attempt to lure users into clicking malicious links, potentially for further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://crysiq.ru/uplcv?utm_term=windows+10+download+for+pc+32+bit+full+version PDF link annotation
    • http://sinching.com/uploadpic/files/202109060658089411.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133f3d2e591d---11363993619.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/309efd67bad9b4b124bcd40ddfaa1013/toxeviliju.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/33444818504.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/161323ae5a5df0---80746003386.pdfIn PDF document text
    • http://scoutpate.com/userfiles/file/totojosefenekufu.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/siluzixidusawetew.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/wafadube.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/45122143763.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/xufefagezidijujibenonule.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161314a0dba9c2---fedofemexupoku.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/deluse.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/jevudux.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/41920816239.pdfIn PDF document text
    • http://topas.lt/userfiles/file/gejemixafeluxo.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/21329534447.pdfIn PDF document text
    • http://bastola.org/userfiles/file/josevoselemixazi.pdfIn PDF document text
    • http://yds-wcv.jp/free_images/files/rutiju.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/dc910f6b3babe69d93b483943fe2bd9f/40799916689.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/77497034069.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/96858690013.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/6ep5djjmchj3b08t16s8pbd6oq/24382780047.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/segogiwewowubiwuzotif.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210908_0081FCA667E298D9.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/8899135299.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/kidiramenipajorefexilipi.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_off0000e4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 17428 bytes
SHA-256: 22ecadcdca2f818a1dded25c3a22bc3e1c22d8b32c1201a2bd2373a105150bb7
font_01_sfnt_off00011185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11185 11464 bytes
SHA-256: 3b41e232e7eed97e112472f621724b7eef143fd66b774c793b63040e5bfaa6f8
font_02_sfnt_off00012cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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