Malicious PDF — malware analysis report

Static analysis result for SHA-256 d03e9a7eae15be68…

MALICIOUS

PDF

80.2 KB Created: 2021-03-01 01:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fe1950f59be1148e099f65bb8d6de838 SHA-1: 228326a127af16a558ab0be66ad48c80818f2fc8 SHA-256: d03e9a7eae15be68d062b1c09ad4290c3a1b45ac7dddeaa5e8403a1ee3a075bf
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/123?utm_term=what+age+can+you+draw+a+personal+pension+credit PDF link annotation
    • http://zitugaxusi.mygamesonline.org/how_is_usps_express_mail_delivered.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/Mhfghcf/didi_and_friends_lagu_baru_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/iahdgfG/background_remover_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/jeuKps3/vivodelofuzuvulipe.pdfIn PDF document text
    • http://viniveba.mywebcommunity.org/hp_elitebook_8570p_not_charging.pdfIn PDF document text
    • http://twobigs.space/48080955882c2g2r.pdfIn PDF document text
    • http://remontnatali.ru/will_2020_be_a_snowy_winter_in_irelando163z.pdfIn PDF document text
    • https://cdn.sqhk.co/sudizatase/R6gdQTa/bittorrent_torrent_downloads.pdfIn PDF document text
    • http://choosemadam.site/63835931695tlsby.pdfIn PDF document text
    • http://tehnotop.site/mejulevifetespyv8.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/xixokarefok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_60140f5e6afb6.pdfIn PDF document text
    • http://jowemiverinoxop.iblogger.org/48559962261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://buzanuziti.myartsonline.com/g_shock_rangeman_watch.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/principles_of_electronic_communication_systems_ppt_chapter_6.pdfIn PDF document text
    • http://xokilovemu.rf.gd/what_can_i_name_my_black_cat.pdfIn PDF document text
    • http://fokomigazojifa.epizy.com/how_to_measure_montevideo_units.pdfIn PDF document text
    • http://wukazenavezexeg.rf.gd/attenuation_coefficient_waveguide.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_off0000ef35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 5424 bytes
SHA-256: 64eea0c8186a89bcaf115ed5c034b4a7c24899025450364acc9300b7d6c57af1
font_01_sfnt_off000101b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B6 10276 bytes
SHA-256: 8c0891a5795adcdcc92d39b6e568fae372768e8763588a82d84018dde9c08bee
font_02_sfnt_off000124f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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