Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde4d0905875afd2…

MALICIOUS

PDF

72.4 KB Created: 2021-01-24 02:22:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 64d79178b961624d95f875e03e8e577f SHA-1: 927f5e2c4229037e51685b7c99ad483fd9fd440e SHA-256: fde4d0905875afd2a65cb84b2fc4c37146731b4d971513fa5bc11d239a382bf3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/aws?utm_term=tarpaulin+background+designs+free PDF link annotation
    • http://vejefulolite.22web.org/cute_babies_whatsapp_status_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/CijWgjy/tufoka.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/jyRjbie/vapukoxirozafe.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/6Z2FpSf/brazil_fifa_world_cup_winner.pdfIn PDF document text
    • https://site-1245151.mozfiles.com/files/1245151/not_answering_the_phone_at_work.pdfIn PDF document text
    • http://puwonasomoso.22web.org/pifovupubagisebi.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/hcjgHij/artillery_sounds_ww1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501206/normal_5ffb5d54a7b7b.pdfIn PDF document text
    • https://cdn.sqhk.co/xapejinogum/0xjg3ge/crunchyroll_naruto_shippuden_episode_168.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/bjciPhi/septic_tanks_in_algona_iowa.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/EcObigg/16461786481.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/hhhdjY9/warthog_red_vs_blue.pdfIn PDF document text
    • https://cdn.sqhk.co/zawukomofise/giihhjd/sell_my_movies_online.pdfIn PDF document text
    • https://cdn.sqhk.co/dudumadopole/ughigVW/online_games_free_download_apk.pdfIn PDF document text
    • https://site-1177484.mozfiles.com/files/1177484/kunuwukizum.pdfIn PDF document text
    • https://cdn.sqhk.co/bikawegaj/ieWr4ia/fifa_world_cup_qualifiers_2018_europe.pdfIn PDF document text
    • https://site-1173706.mozfiles.com/files/1173706/14_day_diet_plan_for_weight_loss.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460266/normal_5fcd4180b6525.pdfIn PDF document text
    • http://zolekumosex.iblogger.org/xelonatafedubewo.pdfIn PDF document text
    • https://site-1177982.mozfiles.com/files/1177982/14992051971.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/iauIiig/1k_followers_on_instagram_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401994/normal_5fe6f2ad5dd53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimiwuzoxul.epizy.com/printable_double_digit_addition_and_subtraction_worksheets.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_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 5476 bytes
SHA-256: ec4f2ebdf386414348304fd52dfad753f0cc9f90a840b9a1d959e9ac152d41a7
font_01_sfnt_off0000f21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10024 bytes
SHA-256: 61ec893d668e4783df257faa6c66f1c2e5ac0b47ca69fbb6bae3fb5dee88411f

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