Malicious PDF — malware analysis report

Static analysis result for SHA-256 048e1f5edd744652…

MALICIOUS

PDF

83.3 KB Created: 2021-07-21 16:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 68fd5704736677fcd271460ea8f23895 SHA-1: dc5a5c31c53761415790feaecc8509ad2af4bede SHA-256: 048e1f5edd74465224904f710b8ce6eb94dc1bdeac3ea40a1e3c75661f8cfc51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The primary function appears to be redirecting users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/nimosuzesixevebiku.pdf
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/9f42d8cab0aa5f0ce25abe64c741f362/49858073467.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/a56tr6nlvlkaemk864hpc7v0fr/72093009576.pdf
    • https://baohohoanglong.com/userfiles/file/16775197362.pdf
    • http://utpcomp.ru/uploads/files/28656657276.pdf
    • http://fixafilm.se/userfiles/file/tojol.pdf
    • https://seerupit.dk/assens/file/95178771074.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/rgr5pi7crmccsid0sernr0qgt8/41898923769.pdf
    • http://granitemountainranch.net/userimages/wapel.pdf
    • http://fusen-es.info/yamituki-n/uploads/files/50752176692.pdf
    • http://prvugkh.ru/uploads/files/29974664956.pdf
    • http://mgocsm.in/userfiles/file/41020693883.pdf
    • http://daearesort.com/FileData/ckfinder/files/20210604_EDCF90FB08AAA71A.pdf
    • https://acronimocostanzo.com/userfiles/file/zadawagilijebisodowon.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/edbde5a9b17f6f6535d39a8155ecf499/lejidoboxolukejawiw.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608797c51531b---jepiweb.pdf
    • https://journeywithmypet.com/ckfinder/userfiles/files/39201708212.pdf
    • http://rld-carbon.ru/file/96064576653.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a669d9dce53---8410495470.pdf
    • http://kiavysocina.cz/UserFiles/File/digimuxogopig.pdf
    • http://zjpjxt.cn/upload/uploadfile/file/37101961481.pdf
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/c03716b2534ac5041dac210ad124b6ce/lemepititifuresapezumuk.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=business+analytics+projects+examples
    • 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_off0000de94.bin
95c8cc3d69027abd1b33a842bc9159051b60493573480ae3aa1d16720cea8a7e
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE94 11032 bytes
font_01_sfnt_off0000f848.bin
8403b424e444e0870885d32b08d741995fbcd82ebd6f33379f6a1cb02053e8f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 17392 bytes
font_02_sfnt_off0001260e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1260E 16792 bytes