Malicious PDF — malware analysis report

Static analysis result for SHA-256 191a79496297cb30…

MALICIOUS

PDF

108.7 KB Created: 2021-06-27 01:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba519639e455abec3d91134feee48a51 SHA-1: e5a2c4cfd2a81a454bcdddab152e5df10e3d742d SHA-256: 191a79496297cb301709b07affb410bdbb93c2005dce5222a010bd8de0c60df7
196 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on various domains, suggesting a link farm designed to distribute malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to deceive users with promises of prizes or funds, requiring them to interact with malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://ketchas.ru/uplcv?utm_term=march+10+jesus+calling
    • http://3xlove.com/uploadfile/file/kifubevi.pdf
    • http://adams-gold.ru/archive/image/file/rovalekiluzizaxafa.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c020e220---56677037465.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a3f40c7971f3721b527f0501e6aa3e14/mileruri.pdf
    • https://windsbs.biz/files/file/tenamawefaparukofawapu.pdf
    • http://eko-inwest.eu/upload/file/xabirupotowev.pdf
    • https://xanbiente.de/userfiles/file/migowibapetosigifaz.pdf
    • http://keacg.com/upload/files/60615380541.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/1udvu5tep19913d6fpipb1nb5p/dosivuxivapadoj.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/aago8bk4nspsddb4360qodhjsr/55113535689.pdf
    • http://olimpic.hu/ckfinder/userfiles/files/ximufiwevofuvozup.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/2dde3cc2caf6049c822ac76c7d87d663/14945132157.pdf
    • http://scheidenschiedam.nl/uploads//file/82266326456.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ae90b14874---lenenufizalapi.pdf
    • http://pallenberg-busreisen.de/uploads/files/muwuridefudivixevumazopux.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/75243425987.pdf
    • http://recviem.ru/img/upload/34248749129.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/1bf1b39c0f70af1710394703a3de3c22/53616875626.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/2b3ffcc3472d75dc2ba821b426d4e968/19700678012.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/gbrhl3628rm0ddg8ftabjr8g6l/49643318924.pdf
    • http://botosani.ro/img/uploads/file/paniv.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_off00014334.bin
96219588cc183998f03eb7eb8d2bdd79ab220a9032d774f66490c28262440621
pdf-font-stream PDF embedded font (sfnt) at offset 0x14334 18448 bytes
font_01_sfnt_off00017388.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17388 16792 bytes
font_02_sfnt_off00018b9f.bin
dd2a6230843035e8068f03c4769b04ca1d6abdf8792b9120b4eddf7720c23e18
pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9F 10688 bytes