Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aea9a26ee07828a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 01:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2efe40e6e284f0d3de235901edaf3bd7 SHA-1: 9e33241e21a314ad0d6b65631b5ff6e9b4ac5338 SHA-256: 5aea9a26ee07828ac00a7a985074e1e3ee4bd636e0e7ea167737a2da2520798f
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The primary URL, https://jumiwimov.ru/wix?keyword=delta+variable+speed+scroll+saw+40-540, is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 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://jumiwimov.ru/wix?keyword=delta+variable+speed+scroll+saw+40-540 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480884/normal_60257dead20c7.pdfIn PDF document text
    • http://worldworkbook.com/wahl_cordless_magic_clip_clipper_black__gold_limited_edition4aw8x.pdfIn PDF document text
    • http://tk-time.site/64582872218ig7aq.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/jokakijutaxoga-savimatarorino.pdfIn PDF document text
    • https://bajusokizuz.weebly.com/uploads/1/3/4/4/134400974/bedesozo-baruxaga-kirodosot-wipukutizil.pdfIn PDF document text
    • http://viwoxavufonodu.22web.org/xozafuwosagexozaduwebapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_5fd93b110e2d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_601a8158a1e9c.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/puradogetapojemosin.pdfIn PDF document text
    • http://duwemoguf.22web.org/69624601413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_769909c221f24b4884cf80438fb6f697.pdf?index=trueIn PDF document text
    • http://bamusob.rf.gd/converting_fraction_to_percent_word_problems_worksheet.pdfIn PDF document text
    • http://baxutuzimux.epizy.com/xoditat.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/89794013796.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/coleman_roadtrip_grill_lxx.pdfIn PDF document text
    • http://bupubuvapefumi.epizy.com/stp_segmentation_targeting_positioning.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_63c02b2b853144799e49c721500ca675.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/64048932055.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_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 5744 bytes
SHA-256: a1b899c68b973af06c08541eb215b302c8c4e7a5cfa874d6ffa0040b3d9c67ef
font_01_sfnt_off0000ffe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE3 11652 bytes
SHA-256: 37162c56432ab7d1bc61ad7497cb732dc6afc8babf913f815ac03ce85eca414a

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