Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c2debe84017ec0…

MALICIOUS

PDF

84.6 KB Created: 2021-09-10 15:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fd555fa4e9ae6027bd7ce5327a1c1753 SHA-1: 29fdfe887814d6f46b5347140944424852ae483d SHA-256: f2c2debe84017ec0786c9515ea2f2ba344f05a60010189d87f9846c93da6072d
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. The 'SE_MFA_LURE' heuristic indicates it's designed to harvest credentials or abuse multi-factor authentication. The PDF also functions as a link farm, directing users to numerous external PDF files, suggesting a distribution or phishing campaign. No scripts were extracted, but the presence of embedded URLs and the link farm behavior points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://ou-ravda.com/ckfinder/userfiles/files/69789362579.pdf In PDF document text
    • https://newdesert.pl/userfiles/file/74543396042.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/36098053608.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613109927c8e0---34824341796.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/17407853459.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/09/08/suveziviweboz.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/58822125096.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/rapavufaloduxagakenatigon.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/3768588631.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/40020318349.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613954f924546---96227844049.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/fizonenizi.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/30882505013.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/wezoxemabowomab.pdfIn PDF document text
    • https://astoraccessories.com/uploads/ckfinder/files/jusuraj.pdfIn PDF document text
    • https://netiko.fr/img/Data/file/54597234159.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/85615153077.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210906_11A3A6C901938577.pdfIn PDF document text
    • http://szjg.hu/images/file/zimanagezilugugesazamiran.pdfIn PDF document text
    • https://majubesar.info/contents/files/zexuk.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/wudilefa.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/30175379280.pdfIn PDF document text
    • https://red-adlay.com/upload/files/vinumaxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=apple+earpods+volume+control+androidPDF link annotation
    • 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_off0000e471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE471 18048 bytes
SHA-256: 4d21d73b576a0b30bbd836a37f2334f4f75f6b34a75240011cafb7ad67d713e6
font_01_sfnt_off00011352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B69 10824 bytes
SHA-256: ce406d7afd59559cd93315c59f01417cc7d286d8ac20bd8bb16786c80d077007