Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb8958074311b61…

MALICIOUS

PDF

87.0 KB Created: 2021-06-28 04:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: efd4b01002b7498ec1142c9a93fd9795 SHA-1: e7471c40fe8e3fd69978dec968a27a4349e816b0 SHA-256: afb8958074311b61b6c90b27eeeac3fc612eedf8b9bc31e47e485fcf6b7ca012
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of an advance-fee scam lure. It contains numerous links to external PDFs hosted on compromised websites, suggesting a phishing or social engineering campaign. The primary attack vector appears to be spearphishing attachment, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/2d7c4ac31209da27418d271b48824c3f/kazize.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/c2baf0d3b786c0f49bb7e686d81065b4/54804430826.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/89104001015.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc0e07b6d9---gogedegasatali.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efdf1a77ac---10734080973.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/av4ujvtbigvfa00mj3gr90uma2/tazido.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160757f0da6677---semokitotujufoze.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbaf83afc---16502827864.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/a5lpequ0dnlenc16aslffiugv5/96844866345.pdf
    • https://studiovizia.com/webroot/img/content/files/tesibatutubafimidoruxopus.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074447a2113c---32483794774.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607233495447c---90435998911.pdf
    • http://cukiernia-waltar.pl/qcms/userfiles/file/momobesaxizefageramom.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bc89197bc5f---madamojisixixavumujumon.pdf
    • http://orosweb.hu/ckfinder/userfiles/files/kodikigula.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d04d396ecba1c913169e996515c60efa/26727239644.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607414d9d1863---45416566603.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8597290b24---43861175188.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3628f074e---fudikemupe.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/73d24d35830a1a8040ef56d25ddc38fb/risurowuriwetipe.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/932ed7928a51f259953270f14569c1d3/bubekofixup.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/eec764534c8dc3c11d53847953bae2a8/dafururijexaxiwomaj.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854d0c09874---79846372353.pdf
    • https://gbagencement.fr/uploads/file/28590929233.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/4toteob0glotgd79sa3sg02jqu/mematonoza.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b6419e0d---pebafolefunigulivoresalun.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+do+you+reboot+iphone+10
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee47.bin
f3fb53544d459b56e152f3446cfc2e9b17fb231bb63b19d1c5f59a13d5358314		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE47 17764 bytes
font_01_sfnt_off00011c82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 16792 bytes
font_02_sfnt_off00013499.bin
5fb424db182add3684d5abcd50d0c891329a675f98e56d79b9dde428ac140f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13499 10720 bytes

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