Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d4e90d2db2131a…

MALICIOUS

PDF

86.5 KB Created: 2021-09-20 21:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 996b08e9dc73dc1875eeed82e3f1d8ae SHA-1: 1cea2f50ade764f4cda1ee73b6cb6e1ede59ca8c SHA-256: a0d4e90d2db2131aada65b3056e118d0447ae1f6e3a365130f2359e7b89a7c6e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or scam attempt. The heuristics indicate it functions as a link farm, directing users to various compromised or disposable hosting sites, likely to host malicious content or facilitate further phishing. The 'SE_CALLBACK_LURE' heuristic specifically points to a pattern of asking users to call a phone number, consistent with callback phishing or tech-support scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://smidgel.ru/uplcv?utm_term=android+tv+usb+tethering PDF link annotation
    • http://divyabodhanam.org/userfiles/file/88158936058.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144ab4c1071d---6184610950.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/61971192074.pdfIn PDF document text
    • http://lovelyspa.net/ckfinder/userfiles/files/75845461137.pdfIn PDF document text
    • http://vecsecity.info/editor_up/23950505916.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eb8016d20dfcc4c195f38a924842e068/puxerepibabapokupar.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/wotawaloxevulusujeradob.pdfIn PDF document text
    • https://parkettworld.com/upload/files/38220176204.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/dipadarazufu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613593b00baf7---12288960499.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210904_F20A7581646354D6.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/mubuveleluf.pdfIn PDF document text
    • http://zkpower.net/upload/files/duvamesakebeg.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/dodokamovekopisigigemisem.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/19171245841.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/kewewopinusimowijazit.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/86167610320.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/29596607148.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613184532d188---vefaxadato.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3dcab23a4---42133529886.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f59ea948f9---56573782660.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/dazurogawasitalop.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/98150466872.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/21785407431.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091122240573499.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_off0000e7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F4 20036 bytes
SHA-256: 407ec29c0baf6eb60d91b48f81f9a4e98a0557326c534516b4ce66b5a394ceed
font_01_sfnt_off00011c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001342d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342D 10608 bytes
SHA-256: d70fdc3b7def090403d46e8f796f8d056d53b5605ee959ccaa28fbf4ba7a803d

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