Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a001c92d8e0aca1…

MALICIOUS

PDF

86.8 KB Created: 2021-09-22 14:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 26ed7192588c1d982e88eb2655a53b40 SHA-1: b5e704d9a8886ecfddeed4a43df9121dee7e5b57 SHA-256: 0a001c92d8e0aca10b9f152810032f630c4cb9c18282d4a548447a89c4c54d98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable hosting sites, with one URL specifically mentioning 'fifa manager 2021 apk', suggesting a lure for game downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 https://infrive.ru/uplcv?utm_term=fifa+manager+2021+apk PDF link annotation
    • http://aj-freight.com/ckfinder/userfiles/files/vizotedugirelojebavi.pdfIn PDF document text
    • http://www.santamyoga.be/images/file/vedosusodotagutuzunijef.pdfIn PDF document text
    • http://clingac.es/d/files/jokoretojowagobugu.pdfIn PDF document text
    • https://bisleri.genefied.co/ckfinder/userfiles/files/kerazubonibonipowetezak.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/55d9d1fbabb885c112303c98a030bdbb/zagolupol.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/53269084801.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/85995974516.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/nubigumozabapoto.pdfIn PDF document text
    • http://hak-al.com/resimler/files/17477516129.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/71553029797.pdfIn PDF document text
    • https://agencement-menuiserie-var.fr/stockages/files/70104103430.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/girorok.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/15081587040.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/76147205320.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f5a0a8bb8---fapepaxesipoz.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/9666239749.pdfIn PDF document text
    • https://rails-bg.com/fckeditorfiles/file/texoras.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/23249018745.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/92410321190.pdfIn PDF document text
    • http://bandwidth.aryanpalace.com/userfiles/file/vimasi.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/31c5e22641b273d18e9dabb64d4b36dc/50135071655.pdfIn PDF document text
    • http://atsolution.org/userfiles/file/20210901182525895986939.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_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 18664 bytes
SHA-256: 43ef23d494a61b1202ceb26f8bb0e81940ef62cfacb514d46a9c1ce5aa2256fd
font_01_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 10632 bytes
SHA-256: b32aa66571e61db68db1cc03d397649386ee538c90578777ae86903e23759caf
font_02_sfnt_off000135d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1