Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de9cac48325b8e3…

MALICIOUS

PDF

79.6 KB Created: 2021-04-07 06:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68d8ef1d684719baa2d137d750b7ed61 SHA-1: 9ec3af7785d0a3852e86265d9c3d226f9d67acc4 SHA-256: 4de9cac48325b8e3104addad165235591a5cd822e782d719e64de4c479e51f04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/wix?keyword=watch+hannah+montana+online PDF link annotation
    • http://wersita.space/how_to_start_a_home_bakery_in_texasdxbaj.pdfIn PDF document text
    • http://zakukat.iblogger.org/benawatil.pdfIn PDF document text
    • http://takipleskazan.org/zadorulaxubok2eu3.pdfIn PDF document text
    • http://goproits.com/does_juice_plus_tablets_make_you_lose_weighteocri.pdfIn PDF document text
    • http://car-den.ru/my_favorite_food_is_pizza_in_japanese5xvcq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_69e9f638ce434ed599f0a27fc975aff7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusori/q_significa_uniform_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/denifabesise.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/wazatexenibuzipovudijekot.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/zirufexujepefapox.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/online_video_calling_software_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/kebobizaz.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/3471359964.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_2700877d36ea4fb8b00c11c9681007d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/phool_aur_angaar_film_ka_gana.pdfIn PDF document text
    • http://xotujulenibol.epizy.com/bioethics_prin_issues_cases.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/39197857117.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/game_online_terbaru_2019_android.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/lojuveta.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_c3c2401b219d463f90e27e01273f1483.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 4776 bytes
SHA-256: 2a8ef805f61603199c8b6781a5d4c65aba644d0bf74ffbde5d8ce56c8647bc4d
font_01_sfnt_off00010c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C54 10796 bytes
SHA-256: 6384a43acf7b0f04bd9940a2ca152329c7abdb68ccb4dc4c4716b117bf79aba3

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