Malicious PDF — malware analysis report

Static analysis result for SHA-256 d391a2a93e6e5911…

MALICIOUS

PDF

84.4 KB Created: 2021-02-10 03:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ee0a83bee52a3c044c26f05e738833fa SHA-1: 9feef448b4f51b995867c16a2c8aa8d56f118973 SHA-256: d391a2a93e6e5911a2fe4158f7413de1848376751664fb86fcddcf31e1ccc5f2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://maypoin.ru/123?utm_term=decora+kei+accessories PDF link annotation
    • http://voztrans.ru/letulisexiwavojcqd2h.pdfIn PDF document text
    • http://loveworld.club/pubogidixojaporwvinf.pdfIn PDF document text
    • https://xizulorojude.weebly.com/uploads/1/3/5/3/135391297/7922811.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikewe/djjicgh/morezekelokewure.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/gjjCsjj/xomilubitedasolaj.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/2015e087f.pdfIn PDF document text
    • http://particulieres-societegenerale.best/jejalakeb0c4.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/6Xajdnn/9287394497.pdfIn PDF document text
    • http://obmenkalnr.online/huisgenoot_diet_plangipq5.pdfIn PDF document text
    • http://sy0n.icu/define_economic_planning004za.pdfIn PDF document text
    • http://chategratis.online/my_friend_cayla_doll_app_iphone7enky.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/zajasew_jiremafujutawek_kawewu_sozize.pdfIn PDF document text
    • http://scarcebook.com/1067841929t9ryc.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/jh53QDs/descargar_reposta_photos_videos.pdfIn PDF document text
    • https://vodazifuja.weebly.com/uploads/1/3/4/2/134265633/tinugelexi.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/caging_skies_download2nd3x.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/vabemavuputenif/work_certificate_template_for_visa.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/mukomevodabatizisi.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/video_instagram_link_online.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/17572863875.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 3752 bytes
SHA-256: 4f4a352e942bd1dbd80b99cdb50951d5c1f47de99c23b1a8dc40e33e7a0f5e8f
font_01_sfnt_off00010af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF9 4824 bytes
SHA-256: 98f41151b63d104813738c134980c58f6f0aa36951e0c57f5dc76e7deb6bbc77
font_02_sfnt_off00011b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B75 11760 bytes
SHA-256: 2c28eb334474dd3aa123a632f6424c420825732f30baafbb24348c2ae4b8256f

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