Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ca0c64506e43f1…

MALICIOUS

PDF

74.6 KB Created: 2021-03-04 10:26:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 300db694b2be2a6bb07c24e02f76ee27 SHA-1: 95c6fb3c3f10efc8ec052270c647bb20b4d1f918 SHA-256: 29ca0c64506e43f1b7b4f271925ea41faaab851453c8069856d7763cc76e76a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a phishing lure about photography. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, suggesting a campaign to distribute malicious content.

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://nipisod.ru/strik?utm_term=how+to+capture+candid+photography PDF link annotation
    • https://noxitituruvid.weebly.com/uploads/1/3/4/9/134904787/dae50.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/20281104951.pdfIn PDF document text
    • http://flymoney.net/69728790533ap8gz.pdfIn PDF document text
    • https://fekoguto.weebly.com/uploads/1/3/4/4/134491689/jused-pajupemuxavemo-webisoregebu-wobutobidagab.pdfIn PDF document text
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/bd0c385ae2.pdfIn PDF document text
    • http://manovina.mypressonline.com/81421429397.pdfIn PDF document text
    • https://lifigosup.weebly.com/uploads/1/3/4/8/134884960/5853042.pdfIn PDF document text
    • https://rofasaxoropop.weebly.com/uploads/1/3/5/3/135316675/6c0600d02.pdfIn PDF document text
    • http://podeves.xyz/acls_2015_espaol_gratisr1bk5.pdfIn PDF document text
    • http://fejazeluxuz.22web.org/sony_dvp-cx985v_repair.pdfIn PDF document text
    • http://pumba-timon.space/bosch_vp44_repair_manualmj6kr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timerojulawu.myartsonline.com/gosifogenetag.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/nitopezixabipajizopapo.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/98493146245.pdfIn PDF document text
    • http://xukenefurirog.epizy.com/fb_video_extension_firefox.pdfIn PDF document text
    • http://govodotogogot.epizy.com/3892400020.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/49810402741.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/molosuwud.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 5280 bytes
SHA-256: 0922e9ba3056d4edf95d76f99bf08a576a20dee184301d47c49721ecce9e277b
font_01_sfnt_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 10256 bytes
SHA-256: 555c44b614aeed00cae0fcc4e90d64c6f48428ae289c44b2da4280c542dd4570

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