Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba1df889e56af317…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 00:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e2cc64da5a1ed87fc650f7615af9f38b SHA-1: 26a02932fb4128aacc666987ba85186b76c0b648 SHA-256: ba1df889e56af317cd34e47e13dfb3530cf4e1469f2b7625b97487a3516d54e5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command-line tokens within the document text, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://catamma.ru/uplcv?utm_term=ice+age+1+full+movie+watch+online PDF link annotation
    • http://silesiacapital.eu/data/file/98662616821.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/41051564543.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161402eabe214b---sovubiwejejivuma.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133dc1c0237b---8946316271.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135562f028ae---noxepi.pdfIn PDF document text
    • http://qdcmd.com/data/files/20728708953.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/viferarapojatatix.pdfIn PDF document text
    • http://kovofilm.cz/userfiles/file/69514318555.pdfIn macro / runtime command snippet
    • http://sung1.com/upload/files/kaxig.pdfIn macro / runtime command snippet
    • http://aranykoronakft.hu/userfiles/file/56345072881.pdfIn PDF document text
    • https://mbzl-pro.xyz/web/img/podborky/files/lodanosafafidadix.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/78391242697.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/42165111255.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/karubotixibe.pdfIn PDF document text
    • http://vo23.ru/upload/file/xibekunewisipifixo.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210901193035_1369599425.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/20850539663.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/24636236382.pdfIn PDF document text
    • https://5uempat.com/contents/files/98940344944.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/13677745726.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/82444707710.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/125b7e2hieie72meaf2ru2c7b2/zunekenoxixovoj.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/85926995790.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/21636409575.pdfIn PDF document text
    • http://ediljolli.com/userIn macro / runtime command snippet
    • 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_off0000e794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ffab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAB 10768 bytes
SHA-256: b53cde925183bc4f51e07ed2fd62afce42682d6de4777f9946cbaf9f9acf43de
font_02_sfnt_off0001185e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185E 18436 bytes
SHA-256: 939f2d9fcb80c6f8c27eff8fdc17d4081aa6fd24b2453ae0cff65558a2898dba

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