Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc5a15851f3ebf3…

MALICIOUS

PDF

76.1 KB Created: 2021-02-28 09:01:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3752ec10c2c921db8df64c782d17e514 SHA-1: 9a4e1c6c3f87296c795eadfc76de8b7cf9dbf669 SHA-256: ebc5a15851f3ebf3104041c7d5617294372eed3b0b20185cb96807bff668d51d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically a phishing or trojan distribution. The embedded URLs, such as 'https://ponafet.ru/123?utm_term=why+hinduism+is+the+greatest+religion', are likely used to direct users to malicious content or phishing sites.

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://ponafet.ru/123?utm_term=why+hinduism+is+the+greatest+religion PDF link annotation
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/fivuxejukipu_gebosogodivez.pdfIn PDF document text
    • http://help-service-support.com/how_to_get_an_internship_in_mechanical_engineering_in_indiagws72.pdfIn PDF document text
    • http://supernefritroller.xyz/cards_against_humanity_online_pldss6n.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/kefidawojoso.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/65708654889.pdfIn PDF document text
    • http://itagreen.fun/102108475022b5ca.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/9ade19540e87b51.pdfIn PDF document text
    • http://table-wait.com/how_to_change_bulb_on_panasonic_inverter_microwaveuskad.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/rodakarugupoko/copd_exacerbation_guidelines_idsa.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/mehndi_design_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/fuxaxirowibexudir.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/ajax_vs_tottenham_goals.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/chauvin_arnoux_f205_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/14456775004.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_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 5352 bytes
SHA-256: c6e5e2994e57e0c1ccc15d0e3560d3e8b662de398fb600d1456518804d159533
font_01_sfnt_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 11192 bytes
SHA-256: 907e6192f5a548201b9898ceac861f73df74ea99a25b26384fe6f3b064ea9e29

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