Malicious PDF — malware analysis report

Static analysis result for SHA-256 560e568597a43bc9…

MALICIOUS

PDF

75.5 KB Created: 2021-09-09 12:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 940067e9e4120e981377396cd371b98e SHA-1: 39b2195ff595ab2e6d6bb080ff5596bf49f36985 SHA-256: 560e568597a43bc9ddf0cecb68ae219453ed76bb4839898fa8d6fc0f74b9daed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as a malicious PDF by ML classifiers and ClamAV. It contains numerous embedded URLs pointing to a link farm, suggesting a phishing or malware distribution attempt. The PDF's structure and the presence of multiple distinct hosts indicate a deliberate effort to obscure the final destination or host a variety of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • 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.
  • 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://tatvideo.ru/ckfinder/userfiles/files/11128607015.pdf In PDF document text
    • http://sivam.pl/files/file/gekobajupekorena.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/torifetumurof.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161334830bda53---vunukegavo.pdfIn PDF document text
    • http://gangwonbnb.com/FileData/ckfinder/files/20210903_C6934E107583C1E6.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/sikezenu.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/rufukawaropuzenoxuxiwero.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/degoba.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210909081442.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/23537909743.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac11d0697---55256296732.pdfIn PDF document text
    • http://manpukuorder.com/uploads/files/92384436533.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/88518635524.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/6395513383.pdfIn PDF document text
    • https://maria-galland.ru/files/file/popoxeguduz.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/53278302710.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/73854930618.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/bogutomejoramum.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/jadured.pdfIn PDF document text
    • http://analhospital.net/file/files/13054468486.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/50519851366.pdfIn PDF document text
    • http://hanabi-la.com/uploads/files/68342432457.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/popijekukeguvirumifake.pdfIn PDF document text
    • http://proxima-design.cz/files/file/88006694155.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/49049353359.pdfIn PDF document text
    • http://metallpress.ru/files/56816776141.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+make+android+apps+work+on+windows+10PDF 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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 16824 bytes
SHA-256: cbb1c6221e63ad8622114518903a27fd9c3938504903d8f938967a686dbb487c
font_02_sfnt_off00010709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10709 10852 bytes
SHA-256: 7a6705f85d078beb62c66671ac7d07fa83061620e3b279b3179cb713b16d62db