Malicious PDF — malware analysis report

Static analysis result for SHA-256 2956a3db598ff456…

MALICIOUS

PDF

71.3 KB Created: 2021-06-10 02:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e4010944ff61fdeeda9010b7448842be SHA-1: 94bf321ea4710eaa6ce907cd1548f4acb7c52fb9 SHA-256: 2956a3db598ff45610ea43cfdb4d82804fa3bf853a0aea68521602ddda9d3e74
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 0.9998

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://wastran.ru/pbw?utm_term=the+hobbit+collection+in+tamil+isaimini PDF link annotation
    • https://kumaneke.weebly.com/uploads/1/3/4/6/134682587/5b640bcda4.pdfIn PDF document text
    • https://jowatoziji.weebly.com/uploads/1/3/4/8/134893097/tilobogoxutafak.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/8126471.pdfIn PDF document text
    • https://mugapasuxow.weebly.com/uploads/1/3/1/4/131437627/9584359.pdfIn PDF document text
    • https://gugekeki.weebly.com/uploads/1/3/4/3/134374678/6550804.pdfIn PDF document text
    • https://supeneti.weebly.com/uploads/1/3/2/8/132815050/pesepazipifir-fireroza-dimelamew-rapuvibafitiwe.pdfIn PDF document text
    • https://dixosupisuboju.weebly.com/uploads/1/3/0/7/130776754/logafutex.pdfIn PDF document text
    • https://gekirexuwiri.weebly.com/uploads/1/3/1/4/131452917/fejozuwod.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/6323622.pdfIn PDF document text
    • https://duxizesojisuvab.weebly.com/uploads/1/3/5/3/135327590/dinesatixa-lerepamak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://xuruzinijub.pbworks.com/w/file/fetch/144423342/strong_adjectives_list.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/82649395980.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/w/file/fetch/144454089/handwriting_practice_sheets_year_1.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/f/defujaza.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144998025/is_love_simon_and_simon_vs_the_homosapien_agenda_the_same_book.pdfIn PDF document text
    • http://bevosox.pbworks.com/w/file/fetch/144997080/minecraft_pocket_edition_for_android_2020.pdfIn PDF document text
    • http://gezebal.pbworks.com/w/file/fetch/144961920/axel_f_piano_easy_letters.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/vikings_season_6_episode_2_recap.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0A 5032 bytes
SHA-256: afbd1f0ab4197eb7117e6eeb8580f7eeb8e3474d4f3cfd61452e1ddeea802255
font_01_sfnt_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 4820 bytes
SHA-256: dfc840fc6b499236d8751f6849a825e97ef50223a6caa080f9226c65535e6294
font_02_sfnt_off0000ec7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7A 10212 bytes
SHA-256: 66b0b6ea321712518e91b04fd155aa90ddcc013941d42d1b3c2b1faf8fa847fe

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