Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd52d48a411c416d…

MALICIOUS

PDF

69.2 KB Created: 2021-10-03 09:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 86e30ddc4f621214b2dc7734eff2d77e SHA-1: bee84190661e6492c0ef79be5045d0dd0d170555 SHA-256: cd52d48a411c416d403b99dfce065e234e0789b6d7d20433b2a77ad7abf75c1f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with a click-outward action, typical for directing users to external URLs. Numerous suspicious URLs were extracted, suggesting a link farm designed to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=araling+panlipunan+test+questions+with+answers PDF link annotation
    • http://abworder.com/uploads/files/19944428984.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/kanorojaxomabegib.pdfIn PDF document text
    • http://ntvietnga.com/upload/files/rogosi.pdfIn PDF document text
    • http://zkpower.net/upload/files/dalezotaparusejejewefinab.pdfIn PDF document text
    • http://sunway.me/uploads/file/16161028192.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/sapoterekemozegokajub.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/jaxemituf.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/37973536747.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/ruzira.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/82553196973.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/94676504322.pdfIn PDF document text
    • http://ventensis.lt/public/ckfinder/userfiles/files/32113464455.pdfIn PDF document text
    • https://activepymes.com/pub/file/talixaxi.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/42696444059.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/kataver.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/40645815178.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/34887144116.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613238aa27480---gusekifiv.pdfIn PDF document text
    • http://szjg.hu/images/file/72859653425.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/63798510339.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/13198874365.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/pekamolulara.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/85492199686.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/moposepesat.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_off0000b089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB089 14220 bytes
SHA-256: 05c27248cdb03768b040a57a223349c7debe60d76fea9635ceb20b43c7a177e7
font_01_sfnt_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 10844 bytes
SHA-256: 59c8c3c0687fe2480c3b8a7d77c9f8b763d67da502d1109ace9288fd258a7750
font_02_sfnt_off0000ec86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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