Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b0a707a441e4c38…

MALICIOUS

PDF

89.8 KB Created: 2021-06-29 07:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c1d7f1fdbb5973e588ba917bebe891cf SHA-1: 9e7d522a6d775b4bded8cfa7c8e26db02fd7e5aa SHA-256: 6b0a707a441e4c38d43f1a786ad181db5ce0802b09c3da864e77e41746793e92
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a link farm pointing to compromised CMS uploads and disposable hosting. The document body, though heavily obfuscated, combined with the heuristic 'SE_ADVANCE_FEE_SCAM_LURE', strongly suggests an advance-fee scam designed to trick users into downloading further malicious content. The numerous extracted URLs likely serve as lures or redirectors for this scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://bahattinburyan.com/userfiles/file/52726795435.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/5a895ecdb8d9edc21a134747bd3de0f8/jamuledigojuraziverutod.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb17332f5c6---jivavoved.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/e8ff5380292905307117212ee9a9a2a1/68360153965.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/42155101371.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f7aeda84cd02f8389a416712bcde0d1f/22268470183.pdf
    • http://www.heksan.com.pl/file/koloponed.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b90b92cf5---bufagixazemowad.pdf
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d692c5646c218dee82573861a7ac59a4/vigoxudaromimolilakoxi.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081f7c22f468---fowupobobuxuwavaju.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7b0547cd7---62614670820.pdf
    • http://ackerviewguesthouse.com/userfiles/file/nosutugolonukebabu.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79fd904e5---bubanagubeli.pdf
    • https://ludifrance.fr/userfiles/file/99218257612.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/beb27e41dc55822288658a8e4a7e6ff7/bebamozuxeta.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52a04ccee---depabovinidaxaxeboxebaxu.pdf
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sotasegizen.pdf
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/120f136ae8c1736f2fd46be5a0c071af/dazikodojexasigidoxez.pdf
    • https://akproauto.net/nbloom/fckuploads/file/zekononojapezenos.pdf
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/118807001.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f1485e14a---16701609303.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8aac55bff487a8a67e0d3c40fbea6630/rozikowomuw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=philippine+standards+on+auditing+complete+pdf
    • 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_off0000fbaf.bin
c4f4c8afe098b0dacacd7c0b796e676974486e58907a730662c4e5db18be6bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAF 16972 bytes
font_01_sfnt_off00012818.bin
5fee0d8d89cfb8635187a45150cc861e9d5f770fc753761b5d6878e106cab4d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12818 11168 bytes
font_02_sfnt_off000141cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x141CB 16792 bytes