Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1c46be486cb0fe…

MALICIOUS

PDF

106.5 KB Created: 2021-06-26 04:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 293fa17e67d3f919a0d230b7fbc24376 SHA-1: e62acee05b8372f442cc390c0b69547a0ce6e4df SHA-256: 0b1c46be486cb0fef8d1e861de3baaa6e40621b8949be68f9dd2916a17b53db9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The document's structure and embedded URLs indicate an attempt to lure victims through a fake employment application pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://coretry.ru/uplcv?utm_term=application+for+employment+letter+pdf PDF link annotation
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/f9gvc5npsgu1l3n54oss6mftk9/26511314647.pdfIn PDF document text
    • http://bangdinhphucat.com/quangbasanpham/app/webroot/upload/image/files/85551063789.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/21063501675.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd80875d43---gipulusejatezuzoko.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/50506012053.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/1619f981dd7815ebab0862c99ebab39a/81265464855.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba96fc75227---mesagexoruvapegatejol.pdfIn PDF document text
    • http://webelievedin1984.com/clients/6/67/676624d6593aa512bfa6e10e765af00e/File/takasanosivalomozop.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/vawigawe.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/50v0b3hkmdrps8v220fqqqvku1/97597351424.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbcadbbf7a---57702952697.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/bigopikobupusevute.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a336c897018ce0832d4370e92752aab1/geziloj.pdfIn PDF document text
    • http://rchs1964.com/clients/5/58/580abc73d3aac4ea3a2bdd7c75327783/File/60669126376.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/7a052a168a7ee1b5f609d74855240533/63387161172.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/856532ae5e08a26473ef5acd1ea0c452/41902847968.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16091adfb3c979---80416354843.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/89b73176381bd0d7ff4f149b638258a9/pepagililotaxupujomijo.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075937f7997a---vududefasimef.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/bibebiguw.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/39131306469.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/57884595283.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/96454372217.pdfIn PDF document text
    • https://goodline.by/userfiles/file/74504003697.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_off00013d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D89 17716 bytes
SHA-256: 4d72c45bc860254c0d981b148662d73b844661927107c38378b30d5e2be28074
font_01_sfnt_off00016bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD9 10708 bytes
SHA-256: d73beb13db108324bbb6e2ae8b4bd7aaffc5fcfa89d1a7351bc9acc713f6b1ea
font_02_sfnt_off0001847b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1847B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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