Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08071f65561dcf7…

MALICIOUS

PDF

88.0 KB Created: 2021-03-09 05:58:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 59045e232e15fc43d44022a6d84f086c SHA-1: 90d1529e1a7bab500f7ce119cf81da7dec28a159 SHA-256: c08071f65561dcf73f503e26a4d2412b7785bdc9ad37271d0bb7bb64a8b23a72
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The heuristics suggest the document is a link farm on disposable hosting, likely intended to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://xajibur.ru/award?keyword=amtrak+empire+builder+pdf PDF link annotation
    • http://warajuvevuv.medianewsonline.com/xodogizi.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/rutedivol.pdfIn PDF document text
    • http://coupons2020.info/what_is_22_carat_gold_rate_today_in_ukxjph5.pdfIn PDF document text
    • http://tujidal.mypressonline.com/honeywell_hz-789_portable_oil_radiator_-_black.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/badexedarofizasewifaf.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/mufilumeruli.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/what_are_structured_credit_products.pdfIn PDF document text
    • http://silekutum.medianewsonline.com/vipevugajusixujogogipaxo.pdfIn PDF document text
    • http://alcozerox.com/animal_jam_unblocked_weeblyo8kt1.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/howls_moving_castle_wallpaper_engine.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/55396784214.pdfIn PDF document text
    • http://nuxuzuruguli.mypressonline.com/black_boy_joy_sweatshirt.pdfIn PDF document text
    • http://copyright-help-center.com/martyn_lloyd_jones_ephesians2fmmk.pdfIn PDF document text
    • http://carinsusa.com/pokagavosdctaq.pdfIn PDF document text
    • http://safetymirrors.xyz/861520367485grqs.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/zesigibape.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/xalexojaxipud/75147936367.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/mikowiju.pdfIn PDF document text
    • https://4a39c6c9-989b-4d11-b2d8-cc0becc7f193.filesusr.com/ugd/ef0078_e9a9b5f84167414bbb69513833a01635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/job_bid_templates.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/cinematography_lighting_tutorials.pdfIn PDF document text
    • http://tevaluzax.atwebpages.com/dezegobemifijisesepim.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/video_song_app_install.pdfIn PDF document text
    • http://penanaras.myartsonline.com/zumo_660_user_manual.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_9325887446a041938ad05d96758aa148.pdf?index=trueIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_395fd41f8c144a84a8b85be37b971ee5.pdf?index=trueIn 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_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 5200 bytes
SHA-256: 900c05d7ceb3276333476cd8b18383a47494db42c959b39b883283ee851278d1
font_01_sfnt_off000122eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EB 15004 bytes
SHA-256: ba43124c6bb455a62f2832a0855156de1aa3d3ca5e751df9318912a372aa5ab0

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