Malicious PDF — malware analysis report

Static analysis result for SHA-256 2005a34143824e7f…

MALICIOUS

PDF

75.4 KB Created: 2021-03-27 15:35:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 20e641424149d5bf9dd2a515b393a42f SHA-1: 5c6ddcac88a528dff1c938e0f3f456fa7a8d2d6e SHA-256: 2005a34143824e7f2e31ba12eb9cf898fd1567b5c78bc66cb4bffa5ec84083eb
186 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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crophysi.ru/award?keyword=abc+in+sign+language+pdf PDF link annotation
    • https://jobovivubip.weebly.com/uploads/1/3/5/3/135392816/4e701.pdfIn PDF document text
    • https://cdn.sqhk.co/gimowiboxero/gfILihr/86439644843.pdfIn PDF document text
    • https://dinelelulom.weebly.com/uploads/1/3/4/3/134308509/9434730.pdfIn PDF document text
    • https://cdn.sqhk.co/didatife/afiiigx/age_of_empires_2_expansion_civilizations.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/mokovekotebe.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/bhggguQ/14841271402.pdfIn PDF document text
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/getasanifomeb.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/icIVNji/vifijalanuze.pdfIn PDF document text
    • https://botuwuroxawezu.weebly.com/uploads/1/3/4/7/134713501/2f40f66f86e74.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/bagarivu_netofezit_vitizusi.pdfIn PDF document text
    • https://kemiponoza.weebly.com/uploads/1/3/4/6/134605011/lezizuse_zemuregu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://721ea522-a1f6-4523-903e-24b3c8014629.filesusr.com/ugd/5a834c_32809181a48c4d90a9355084b6e063d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/10606800054.pdfIn PDF document text
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_bd15e8b093d24ab3a2c3e7d19c006c7f.pdf?index=trueIn PDF document text
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_d8c3c72272e140428fa0ca00c88c3e5a.pdf?index=trueIn PDF document text
    • http://jezuguxefigowi.rf.gd/93050459679.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/87844436415.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/happy_birthday_images_for_niece_free.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/4121852993.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/spring_resttemplate_set_auth_header.pdfIn PDF document text
    • http://wunenubomoge.epizy.com/the_last_of_us_2_gameplay_trailer_song.pdfIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_3bee1923ec444361bfb4bdf34fd138d5.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_265223c11ec04729bb8ec5b3b941241f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 5356 bytes
SHA-256: 78f4d249b9720f2df236cde408f650232c7fb02914385541867762e88b70307f
font_01_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 10976 bytes
SHA-256: afd4a635014119e2f15a2241407501773cae0f33736e91d00cadeeeba235abf9

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