Malicious PDF — malware analysis report

Static analysis result for SHA-256 87826773206c9731…

MALICIOUS

PDF

74.6 KB Created: 2021-03-16 13:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b941eefead8ec1ec8aaadeb80f87c153 SHA-1: e4e2f5ee46969f9e98744e9cd2be80af0e44c88f SHA-256: 87826773206c9731987d364da1f0f63f139cc171030681d16c974bb6af44429a
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable hosting services, indicating a link farm designed for SEO manipulation or traffic redirection. The primary URL `https://mezovuduw.ru/wix?keyword=polynesian+tattoo+meaning+chart` suggests a lure related to tattoo meanings. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to drive traffic to potentially malicious sites or generate ad revenue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/wix?keyword=polynesian+tattoo+meaning+chart PDF link annotation
    • https://cdn.sqhk.co/jesovolavig/nghmg7b/tangled_characters_names_and_pictures.pdfIn PDF document text
    • https://zavetogodafewer.weebly.com/uploads/1/3/4/7/134709275/newinolafux.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/djhhdia/airline_pilot_salary_california.pdfIn PDF document text
    • https://vedemolo.weebly.com/uploads/1/3/4/7/134702866/5f0acf01d68a16.pdfIn PDF document text
    • https://gobajirosalafos.weebly.com/uploads/1/3/5/3/135392744/947348.pdfIn PDF document text
    • https://cdn.sqhk.co/xedasuzefer/Mhdqgcy/96931470451.pdfIn PDF document text
    • https://cdn.sqhk.co/norasoketika/Uhj0hj0/kobemodarawufopab.pdfIn PDF document text
    • https://devivevapidon.weebly.com/uploads/1/3/4/7/134711806/teboraz_pabepu.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/4527072.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/ihPjcDn/what_is_the_meaning_of_the_christianity_symbol.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/hfVAxjh/power_mp3_player_free_music_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/fjjjcMJ/ruvuretomovisipig.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/zifilobesumafi/juralidevati.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/cdc_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79f64b0c-02cd-4e0e-87ac-51a41fd5d51f/gazobajuxedagiguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f0786c0-1e8e-478a-8e50-18e725cb44dd/mavomutudimizosoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/306d0081-c07c-456c-b03a-83af5496f789/kofosob.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/75862884958.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/dejivarotodiwupasuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/wedding_march_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/word_analogy_reasoning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f3331b-4799-4cdc-b15e-1424673efb8c/41482254380.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_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 5316 bytes
SHA-256: 8e90302b3c05bd11dca96a693dd3fc9cce89f99d0360a8bad75eef6963065c92
font_01_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 10560 bytes
SHA-256: 9e4db93908d50e2522fbb513c1c4db0c7d060a83264d1f3e0517121dee35e269