Malicious PDF — malware analysis report

Static analysis result for SHA-256 219936810d52bbd4…

MALICIOUS

PDF

96.8 KB Created: 2021-06-25 21:19:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3cc1c48d9c6aa4971051f57a8285195 SHA-1: 35306797f98879658551c3b6bf2ec374142040c4 SHA-256: 219936810d52bbd439d68657eaeabf5cc839087332355a1757ab37ac66e7b4e3
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to compromised WordPress upload directories, likely serving as a link farm to host malicious content. The primary lure appears to be related to lotteries or prizes, a common tactic for advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=play+4+lottery
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8eb949fa---jizupisikiveditirafoziz.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084cf7a10c1f---63599719316.pdf
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/06da623472f06b1ec702a7b88b75132d/8708351418.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/u9u0lqk1j77ndjqko495ep3npe/88405142473.pdf
    • http://esebtekstil.com/resimler/files/58960957767.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c690614c0e3---lefojo.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/823mc7mj8eq7vg4ui9dv77a7c2/87216619271.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/0784d573c6c61b030ad5520836962c0e/99266147135.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095d4f31c9fe---baganopagafisafefew.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/befodisasilenukir.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/fuworovasofejubepudav.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/cebfc8110ebcf28280ceff7d883b3c6a/76169344220.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/f1a0b2996d3c503d89c037127d01373c/mujunozu.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b766fab8616---rogenixajo.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/6de15415aae2d95c20aaae8b0c67942e/lusolubusirobajaza.pdf
    • http://ahchala.com/img/file/17422087369.pdf
    • https://echipamente-scule.ro/userfiles/file/93356651280.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/cu21r4ab111nbk5at6jbpv9ua7/6237187588.pdf
    • http://gat-asset.com/CKEdit/upload/files/lenonajigopadoves.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/3464760eddd3d33a7b3ea17bd41b0519/43099026497.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/79191cfb06221d1f0054eb1bc993ace5/87266744468.pdf
    • http://fkhd.cz/data/img/99076509625.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac185fd8742---nobaruguzijixafu.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_off00011770.bin
14c8e67c11d830d2693919040bd17d5143b989682fc5cc816e55e62b0e00c420		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 9928 bytes
font_01_sfnt_off00012d9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9F 16792 bytes
font_02_sfnt_off000145b1.bin
098e83a2666df6e8841e4d45ef5a7a9e494c74c1edb68dc01d34a10ef620dc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145B1 18004 bytes

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