Malicious PDF — malware analysis report

Static analysis result for SHA-256 846112126aa3d2b3…

MALICIOUS

PDF

75.0 KB Created: 2021-09-03 08:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0c4ab8268936e1589ea9e5713a8b1bad SHA-1: 2e11e9edb7cbe76533cdff3d11e0084a700d2cad SHA-256: 846112126aa3d2b38bbae63e11365f2fea443218e00871244231e3f04ada137b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document has been identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, directing users to multiple external URLs, some hosted on compromised WordPress sites. The document's structure and the presence of numerous links suggest an attempt to deceive users into visiting potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://amblamy.ee/upload/file/duzuvadigere.pdf In PDF document text
    • http://reginahajo.hu/_user/file/gobisevepudosu.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/16237623303.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/bugugikodinawalogusoxok.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/9a98c1d228d1755b2ef9e33aebde1d76/68851324222.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ufbd2nvrolssh8oeno9aor9jv2/rolurovup.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/232d27e8f381cc963811464ccaf30d5c/91743429189.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/dolomirutizegenowaxogek.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/xegesowakulekexigalerozun.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdc1d41bd4---5345266820.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/63683566447.pdfIn PDF document text
    • http://xinyuemu.net/assets/202108/files/20210801075919824371.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/serowekidanevupisu.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2dcc257d---pujonisinisata.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/xumozilekokanu.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/nebat.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/kawudotusukodujomibemo.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/eee388dba73bab518ff7b84bee9b97b1/pufaj.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/161185b13d86a5---27329934990.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/ukkap0i760rjbop5pr43f9ibs1/88004625887.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/f3ecde65de55c720651d9bbe14ba0388/wofajarowagaxomuzerasofab.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/87417916092.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/4ohbfj6dnmhejjnvmvn1uogcrk/13729947505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=morphy+richards+900w+combination+microwave+d90d+manualPDF link annotation
    • 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_off0000bfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 16624 bytes
SHA-256: bdeed293a6293f4d0ba82a6b35402555f4622329494a0095ee395aa36ed043c4
font_02_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 11568 bytes
SHA-256: d19101d6289a6b1bab5b3e11e031ae7ea3e326200fa791dccdca3947791845b3

Open this report in the interactive analyzer, or submit your own file for analysis.