Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae86b0596af95cad…

MALICIOUS

PDF

88.0 KB Created: 2021-06-29 19:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a718dae824a50233681d5e789e0b546 SHA-1: aa9fc9ec4c12a2ed01892995c901bf5a541e7fe0 SHA-256: ae86b0596af95cadd0194910623588eb61c7340ec930a3fb475429fccab9f4f0
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to a variety of external websites. Several of these URLs are hosted on compromised CMS uploads or disposable domains, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://lixupeng.com/uploads/files/59492943395.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0a3e9e6caca4fc775ec2f8a2112f4377/sazebarazota.pdf
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/niwimo.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dosuvujusaxonaluzukarif.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c553f3a1---zusujumusiver.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69d6ed44c3---46486340987.pdf
    • http://jdhs77.com/clients/58520/File/biwiwizavu.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e1c678b4d2f227de89a77b45aea0ec0b/figukageragisuvovoxa.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609899e8aa780---fupakufozadavudesonegi.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf589b93b53---57367626425.pdf
    • http://ayurvedicclinic.org/userfiles/file/78964682214.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c08347c71f2---84700370772.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b5dec2ed4---11230843524.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/57d04d90c1e240bf8a941dc2e94933a1/muvowapimexo.pdf
    • http://ciaooo.ru/uploades/userfiles/file/luteparumejimidonizuf.pdf
    • https://jmtours.co/aym_image/files/mubulegigedopabitoja.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d89f79864---18111744588.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/7b2594601b015ab716972128789cd06b/sivenit.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/01ff2c3f78182ad195408498b4bb9161/fiwiwaweze.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc95c2da5---xakafipup.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/fgq7cisb1d20893iaacegdit5l/nifufujunijegefimamerelu.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/4a2e4cf50674378883289d5e51337efb/44621376496.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/f4o2jisj4fsrkq4c4fh728f432/kilekup.pdf
    • https://arnetbilgisayar.com/upload/ckfinder/files/xepolenoxokafasenoxefor.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16093cab1640f8---95645526653.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=snoop+dogg+game+of+thrones
    • 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_off0000f237.bin
0be5a52c39d7a4319f97d9d67c2c56cbe68df66c1707b6101f2223a2a16271a2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF237 10884 bytes
font_01_sfnt_off00010afe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFE 16792 bytes
font_02_sfnt_off00012310.bin
2022bb1a576261f066fdef270993f307f4df6b83ff593fd2ed0ff3580dab36d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12310 18040 bytes