Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8eaea12131d97ba…

MALICIOUS

PDF

69.9 KB Created: 2021-09-05 01:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: eb48321d8920baf1e68ad4b0aabc2d47 SHA-1: 8ce5e2d20080c16acb4beb6ebddefbd662a5edb1 SHA-256: e8eaea12131d97baab9c334759fcaacea437a1bce0de7b95337079d45374a20f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable links. It contains numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing pages. The ClamAV detection and ML classifier further support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=demonstrative+pronouns+free+printable+worksheets PDF link annotation
    • https://htchninc.com/d/files/gizafenuzizowuwi.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/joxakazepizonodolaw.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/75151766816.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/e5f82c5debbbeb6772154653e66748b5/46276461169.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021070103023770554.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/diweketa.pdfIn PDF document text
    • http://heizler.hu/files/file/44970706282.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/de23d77d68374a0e432fc2e9796b2493/20285738544.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/68750312332.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/xakemuferubevofasezilosof.pdfIn PDF document text
    • https://506hlapeta.com/files/file/daxepikuxolukelijanarow.pdfIn PDF document text
    • http://royal-pizza.eu/files/file/43723173982.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210810_122450.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864392248cc---pazitafaxovaziporifonegen.pdfIn PDF document text
    • https://breedlife.com/upload/files/fomineka.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/24194132366.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b207453e512---21394260364.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/wadobakusixep.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/zeviwugakazagolafojonipud.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/161205e920d7cc---76988192308.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/kavizixu.pdfIn PDF document text
    • http://nensi.si/upload/file/42184971127.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/jijexonug.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/88706730674.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/3c6647ff0565cad35f7d8be052fe2db5/zidug.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/23208983189.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/nebazamewid.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_off0000b478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB478 11108 bytes
SHA-256: 8d6f1b8896b4ab171298d307a725efcf6f044821b8f14b61226efe12ec231732
font_01_sfnt_off0000ce06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE06 14364 bytes
SHA-256: 2ca3515c1e2b45c357796c699a4cb3ead7eb72b4eea16d63f55c84043948c30b
font_02_sfnt_off0000f18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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