Malicious PDF — malware analysis report

Static analysis result for SHA-256 2162f668603d10ea…

MALICIOUS

PDF

71.2 KB Created: 2021-03-02 15:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: b4420ff62c1adb4bd3ed9cbe0f48b127 SHA-1: 796458ceccef19ec42653613c791e599f4843dc0 SHA-256: 2162f668603d10eac5a314940c6c25c9021a9c696ab1d4a2d496501f1ac4959b
146 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of PRC/3D content and duplicate object bodies are also suspicious indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://fokemale.ru/wb?keyword=d&d%20warriors%20and%20weapons%20review PDF link annotation
    • http://pagavopalubutu.scienceontheweb.net/movies_like_jack_reacher_never_go_back.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/16th_century_italian_peasant_clothing.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/takebelabubolu.pdfIn PDF document text
    • http://helpcontactform.com/woxuragibopovoxevajnq2s.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/what_was_life_like_before_world_war_1.pdfIn PDF document text
    • http://nukapag.getenjoyment.net/xarimewogileg.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/fairbanks__morse_1_1_2_hp_z_engine_parts.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/82023169061.pdfIn PDF document text
    • http://sunufosabupes.scienceontheweb.net/how_to_identify_fake_id_cards.pdfIn PDF document text
    • http://lisuzigerob.mygamesonline.org/how_to_record_with_dish_hopper_remote.pdfIn PDF document text
    • http://didazema.mypressonline.com/how_to_adjust_burner_on_gas_water_heater.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/43600179694.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/how_often_should_you_replace_wahl_blades.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duvodix.myartsonline.com/mortal_instruments_city_of_bones_book_series.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_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 4156 bytes
SHA-256: d46272a35c141788e45a942f60d3ac75eba256168db5716376ff56f0f84bb3df
font_01_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 10924 bytes
SHA-256: 0e8fa8c4f219e1cb352ba0511735b1a71a29904229bfe90c174138b38054c77a

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