Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0a7706a2407562…

MALICIOUS

PDF

83.4 KB Created: 2021-06-27 07:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14d5562aa02eebbe59bf9303f932d345 SHA-1: f848bb8b0e08282770b3e4f8729056cb3a6d3c0f SHA-256: 9a0a7706a2407562738ced08388667c347c71d4a1906aad13503a6e63f195625
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to websites hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://meadescafe.com/userfiles/file/wovemu.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/237489a070fcddc4eac8851fc0b04336/36465803378.pdf
    • http://astro2sphere.com/admin/images/file/rugojef.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/5qrkhs7gh2j4du0o6k9qvfplrd/begelijara.pdf
    • http://sanarina.de/ckfinder/userfiles/files/16866962999.pdf
    • http://sxhk365.com/uploads/file///4301831585.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/066ec640ce3ed83a7768b29e85f6ddcd/pofawirixugaselosalinoj.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e74ee43ce3---marekebugijenete.pdf
    • http://longarmacademy.net/fckeditor/userfiles/file/62792878731.pdf
    • http://playeasypiano.com/resources/fck_images/86367686555.pdf
    • http://somsit.com/ckfinder/userfiles/files/sidegon.pdf
    • https://iword.de/userfiles/file/53204841410.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/7uo0srtdidnhodc41lttcuqmur/kizozabutobarufa.pdf
    • http://goldartline.ua/userfiles/file/dipukerinorurelavabo.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a75bc14f33---debagovibemofezi.pdf
    • https://alshaabcoop.com/userfiles/file/suvavu.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9c25f57c5d0b51eeb4ae00174c246fa2/pupafapile.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b05237ff3---59394520756.pdf
    • http://muzeumostrowiec.pl/obrazy/file/96438262879.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad5a543ec2---11980025089.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/fc01fa9add086bce290d84421c7a4994/xarulaguxovifipoviz.pdf
    • http://banghaija.com/userfiles/file/jamolasolonuxom.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+save+one+page+of+a+pdf+on+iphone
    • 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_off0000e265.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 16792 bytes
font_01_sfnt_off0000fa7c.bin
1f726b3cea57855cec70adb2797af616e0115cdca8ce9c42e268b0eafce81c5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 10772 bytes
font_02_sfnt_off00011309.bin
76e923981202b1c5f1849ace306abe63d54998644bcb092fd40404d46a906bdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 16760 bytes