Malicious PDF — malware analysis report

Static analysis result for SHA-256 97285a3307859411…

MALICIOUS

PDF

73.2 KB Created: 2021-04-03 15:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: de9cb26946726b323b915509fac235f6 SHA-1: 8bec7962495fcb1fb2ba8da0d189e21f2e4bf2ac SHA-256: 97285a3307859411859ad3b9957237da277f8f578e4a208159f8eb2d79f7b68b
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-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.
  • 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://pelibifir.ru/wix?keyword=arnex+pocket+watch+train PDF link annotation
    • https://bobifadilow.weebly.com/uploads/1/3/5/2/135295989/1102415.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/B6or1ia/yandex_taxi_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/f2Hnghk/72959057194.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/febadokobizi.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/5366934.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_82ae09970f1c45b5803d19b20d4d4975.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/asure_id_express_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/pokemon_go_beginners_guide_2018_reddit.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_94065588228842d485fa602f7e3ae894.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/zilisugesemef.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/gowajod.pdfIn PDF document text
    • http://vujulazi.epizy.com/probability_sampling_methods.pdfIn PDF document text
    • http://levigorofelo.rf.gd/1790434192.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/fodowibib.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/dare_game_questions_and_answers_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/wikofixokelawume.pdfIn PDF document text
    • https://39c10a3a-92c6-412a-a1bb-b8a1fc48fbc4.filesusr.com/ugd/259099_1a09a7a514f5445aa0bdceac51804f4a.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_off0000e03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03E 5024 bytes
SHA-256: 28bf8b13688b08dc67d61bbc37e50619752be96c688438999e4fcd0282a641c8
font_01_sfnt_off0000f16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16C 11248 bytes
SHA-256: 41598a1904a8f9e064988983249855bd4cfb97cf9f0ddb77bab044ca515ab6fc

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