Malicious PDF — malware analysis report

Static analysis result for SHA-256 348fb205bf57fc80…

MALICIOUS

PDF

87.8 KB Created: 2021-09-17 10:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 82c889c48035acf23119e319404f9ae3 SHA-1: 9f203a26b2b719787e758df080c635418f68cf6c SHA-256: 348fb205bf57fc805817ba16049fd2f82b8cb89fc63db36b7bf10d0694d14b0b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, impersonating cloud services to trick users into clicking embedded links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://synerhu.ru/uplcv?utm_term=how+to+set+up+printer+on+android+tablet PDF link annotation
    • https://cambodiadriverservice.com/userfiles/file/66150575910.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109110405413165.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/18933557678.pdfIn PDF document text
    • http://capital96.com/userfiles/file/demumariz.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/sumar.pdfIn PDF document text
    • http://partnercable.com/files/84732011036.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/gasotamatuwipasivulaxepo.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/kipowoxasetigek.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/54304275492.pdfIn PDF document text
    • http://innotack.com/userfiles/files/38811021652.pdfIn PDF document text
    • http://jmk.kr/ckfinder/userfiles/files/50435915839.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/maxuladure.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/motexa.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/zikiloriter.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613e345f4978b---jefex.pdfIn PDF document text
    • https://tanhaithanhvalves.com/quangcao/admin/file/lesisimoxikekoxe.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/92678362901.pdfIn PDF document text
    • http://emeat.ru/var/files/sisepamamuvamepikut.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/41680902600.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/tipixanikakuvamupuwefi.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/77242682589.pdfIn PDF document text
    • http://runo34.ru/attachments/file/siwoxofo.pdfIn PDF document text
    • http://sreema.org/FCKeditor/file/82517741824.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/beturisotojusi.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/votelatiweromaruvafelug.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/rusikibalitem.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 10700 bytes
SHA-256: 2f5487d1126346045e1700214202f1ad778f26017d2ec07c83310bd62c186013
font_01_sfnt_off00010b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6B 17492 bytes
SHA-256: f1c8c8dc0164f726ca2f2459dc2f3485da80deb1cdaaaa15f4bfb1c29e145011
font_02_sfnt_off00013912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13912 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1