Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee637241b66361e…

MALICIOUS

PDF

198.3 KB Created: 2021-07-07 16:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: db1355a34e4808b2c733d5ca3cee207d SHA-1: f081b1816598f4da5401f750e688ff35b16a3ae1 SHA-256: 0ee637241b66361ef18750db2861377b7483ccfa34b81c14a45f3ca7d3453680
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document utilizes an SEO redirector to lure victims into downloading malicious files, as indicated by the 'PDF_SEO_UTM_REDIRECTOR_LINK' heuristic. The embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution campaign. No scripts were extracted, but the overall structure points to a malicious document intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9821

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=weaving+table+minecraft PDF link annotation
    • http://jngf.cn/files/file/kevikavidozedopi.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/56155480237.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/66078610453.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef4834357---mewisanasuxinabi.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608675209b943---xinixibid.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6835cb45d0b13d4bb4ee57b7e252b4fb/zasurimuvosupanikek.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fd09ac1dc---dogukakebomilewolumolat.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/6796b57eff5f5d6995a631356dd27143/18276710789.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098b3ecf20ba---momakosom.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777470ac099---xasob.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/70488653944.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/xudapaxa.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/598a1d6dd118990e66a4614e97edd5f6/7561132412.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9112cf477---mifigoguwinewafade.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/nagazokebejibezagaxurodi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/op7amndm5uiaatf4tqh68riht0/3912582171.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/96a61f17e73618a814c79fd5d396a722/85553292471.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070c2a94eed0---gegokap.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/dotowid.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4e6c4d221228ac4edf1ba91c01ec0a07/116392748.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/fobd0sc7hon6gvqh2er0vdmuth/zaxebolakalaxufiro.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad6274c941---99812907702.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/c59ed0bc55e9af5bcb8ebaeb1ee6f5ff/78512011409.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_off0002ae62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE62 10592 bytes
SHA-256: 8ede94c95271894c18d1dabe51ff6a5eeddc1129ef168415ab46387141673ae3
font_01_sfnt_off0002c68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C68B 17320 bytes
SHA-256: 170e2623ae374bc7c8e24a1fe8f205e1d3bf0b5ffdd6736a91fdc7b76acaffb8
font_02_sfnt_off0002f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F337 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1