Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc7a742b12fd9082…

MALICIOUS

PDF

78.7 KB Created: 2021-05-19 20:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 94aff38aeba0163459f65c9e39133b90 SHA-1: 76662577fe885ea145f1a291c6e730dc1bc565fd SHA-256: bc7a742b12fd90821354857941a6bfb722d3b9c035625090cbc2320b02753a98
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains embedded links, one of which points to 'jottigo.ru' with a query suggesting a serial key for data recovery software, likely a lure for phishing or malware distribution. The PDF also hosts a link farm, indicating a broader effort to distribute malicious or unwanted content.

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://jottigo.ru/strik?utm_term=serial+para+easeus+data+recovery+wizard+free PDF link annotation
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/jopede.pdfIn PDF document text
    • https://magavesitike.weebly.com/uploads/1/3/4/5/134581553/denezekosidi-lasorefareb-wejodevogom-vibizamem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504839/normal_6009b9afe9420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502493/normal_606829033db74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470017/normal_5fde2ff4455bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jivuxo/19684829161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a57ddc-9168-415d-ad47-c6694b84442e/13400280277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3674b725-01d9-47bb-ba4d-5750466c3d7f/96034776397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cb77644-88fd-4f25-b6c8-ef08451662c8/how_to_sync_new_remote_to_tcl_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bf060b-355d-4916-b946-4f0d6902eb82/60497302650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d4d703d-f12e-4733-9f39-c1e87684cbde/problemas_educativos_actuales_en_mxico_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2585433-92e5-4256-a3d8-ea9b1dae4a1d/what_time_does_peavey_mart_open.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9fe5cc-f562-46a3-9de7-face48e26619/cuantos_dias_de_fiesta_tiene_estados_unidos.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/pewesosefiwazemomafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48fcf984-cff1-4b91-8222-d2f8f16f4a46/ruralolobuxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87988ebc-c752-44e9-a420-697f6a6981bb/xiviradolonuzikekibu.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/34532133762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a41149-9a89-460b-afd7-cfa9e9c0c487/begakakamabutukeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0770efdc-b118-4833-9cae-e8d7fdf34aa7/8746123381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c464f6-f165-4a7e-a608-94620f8caeef/suterunamonutu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5556 bytes
SHA-256: ea1c8f1b074ee876e667121ced8832bb17059fc137b6d18f639737e9390b2ae7
font_01_sfnt_off000102b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B6 13156 bytes
SHA-256: 7d525bc122d9f0f6689ccaf9e534a2af6a1de34d213b1b1515661c4e979660c8

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