Malicious PDF — malware analysis report

Static analysis result for SHA-256 e715024855bc5bc0…

MALICIOUS

PDF

96.3 KB Created: 2021-06-30 09:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae188afcf6f1459f8482e207d3ab94e3 SHA-1: e4efac0c7ee56a888e6cfdab42b38bc7e7bee635 SHA-256: e715024855bc5bc0e65abb134ce062592cb5ff558ed3a1b1d8e5b23f07b5c751
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • 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.
  • 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://garglob.ru/uplcv?utm_term=ppr+in+sheep+and+goat
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/d9ib6tvlf380dmtco3qi8qpbs4/lumudetopoxukasi.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/in0v6c2ceh0g6e8k2lm9kpkss7/nisinisolatewogazuge.pdf
    • https://firsatpin.com/calisma2/files/uploads/41829516405.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330b6d8177---tididatebafoje.pdf
    • http://mabifitness.it/userfiles/files/solazebokalelavidi.pdf
    • http://klhl.com/userfiles/file/83683042660.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16095ae9b2b94e---61942916028.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/461abaa1e713423d9070f5f110c64f07/40097824078.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/nribi75683egri46pi4f0tqaqf/fipetipoj.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5a0cbbe9fed942ec7a46ea695c1f4a31/gededafepewa.pdf
    • http://albino-pitti.com/pub_img/file/2043066369.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/dbc951948c942a5ed1dfbe80817ddac4/76066825933.pdf
    • http://therealmccoyfamilyreunion.com/clients/f/f9/f9ea119420dddc0cc5ac7622830b9f68/File/33533064643.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/jhb7lt7i9hajukp5j3g7s3oadl/80618902885.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/192d17b841d24b2ff8499d6bb4ce9fa6/93468446339.pdf
    • http://raczcsalad.hu/files/xatavo.pdf
    • http://grubstreet.ca/ckfinder/userfiles/files/komowegopugatugidikete.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1973628da562c78e0557eacaf0abe970/medizivuparewebirujofoxot.pdf
    • http://agnieszkapawlik.com/userfiles/file/vidojen.pdf
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/tofidi.pdf
    • https://thinkhigh-tech.com/d/files/89434715286.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/0l04emtcsf5ppbpikoq0dg4cg9/rafixifinirovareselebo.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/426cbd397eae0c98cd56474f3122d0c7/85248917295.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/7eeb0035302f9ff899a3b94cf4f78db7/37704838543.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fff6c96459---nigajubezewifeb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fed7.bin
d01ed502e62b9f312f890f2571c9e0c9979b6b87266041649a3b3bfe0bd41d2f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 10624 bytes
font_01_sfnt_off000116d4.bin
98bcec2be85b547d266a48c61dccc50816b624367bf69e2f194f2b8087d010f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 16092 bytes
font_02_sfnt_off00012c11.bin
68b173c0eea9adeebd921f23992f7f3d15753be14b50ff9b9b53bb8c5a00ddc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C11 17992 bytes
font_03_sfnt_off00015b6d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15B6D 16792 bytes