Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b62ff05ad19361…

MALICIOUS

PDF

78.4 KB Created: 2021-01-24 01:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 19845cbfe7bca1bbb2e6a2df019f708b SHA-1: ea2dd412252698ab56ec841766a708066886885a SHA-256: f6b62ff05ad1936197796e718358be936109952aca2cfbd42a43f2965f979be1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, 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 links are consistent with techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=bootstrap+4+datepicker+form+example PDF link annotation
    • http://rarebuzoxexovom.22web.org/kafek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5fc7a0744d269.pdfIn PDF document text
    • https://cdn.sqhk.co/natefisaka/3Kx7jiS/pisope.pdfIn PDF document text
    • http://negeduji.66ghz.com/fortnitemares_challenges_cheat_sheet_part_3.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/v5ljajc/stick_super_fight_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_5fd3025161abc.pdfIn PDF document text
    • https://defeluzeveloj.weebly.com/uploads/1/3/0/8/130873982/jimewasisamofiv.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/jaIhdhd/britney_spears_american_dream_hack_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fc6c7746ff9c.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/ghLAChf/qatar_stars_league_log.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/mafut.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/afrikaans_translator_app_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449177/normal_5ff05e0162c9f.pdfIn PDF document text
    • https://pefibiwurabamiz.weebly.com/uploads/1/3/0/8/130874510/gazet.pdfIn PDF document text
    • https://nazawerud.weebly.com/uploads/1/3/4/3/134353719/3672110.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikirubuguje.epizy.com/71940149094.pdfIn PDF document text
    • http://guxudapese.epizy.com/accountants_salary_guide_2019.pdfIn PDF document text
    • http://punegejofuj.epizy.com/canon_in_d_piano_duet.pdfIn PDF document text
    • http://vowefaxi.epizy.com/bajrang_bali_dj_songs.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B4 5572 bytes
SHA-256: 05810d9a4182424430755d9ce6dac03dc784da0f879bc080ce257cfc57498cf5
font_01_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 11276 bytes
SHA-256: 97c8f2bfc9560815c54527044bc4b66acaf17b30c11e6cf84e7c8276ddb8f9d3

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