Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fd4a87ab5efeab…

MALICIOUS

PDF

75.3 KB Created: 2021-02-04 00:48:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff9171210a130f1df5a31cd446bb9b01 SHA-1: 8028c55069d076956f41623d4755ac96625ba7e1 SHA-256: 93fd4a87ab5efeabfcb49dd2e36cc957121b29942ed8a3183de3abee651a8e96
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and potentially serving as a link farm. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user interactions, further indicating a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://bologen.ru/aws?utm_term=kiss+the+rain+piano+sheets PDF link annotation
    • http://digitalmicroteter.xyz/ledubixuxh9.pdfIn PDF document text
    • http://eurofamily.pro/italian_grammar_rulesmcjtm.pdfIn PDF document text
    • http://tacfitproducts.com/les_droites_remarquables_d_un_triangled9aby.pdfIn PDF document text
    • http://korecos.ru/nowiliqr7bq.pdfIn PDF document text
    • http://vorecan.fun/7931068394575xrh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5fcc454a38f5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497395/normal_6012fd592831b.pdfIn PDF document text
    • http://detaxinema.22web.org/online_bookstore_project_report_in_php.pdfIn PDF document text
    • http://morikulifitoj.22web.org/binary_bot_script_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nanovinojon/JKjahdy/fevelojizisimevikukizeji.pdfIn PDF document text
    • http://instas.site/bdo_villa_buffs_guidet16qi.pdfIn PDF document text
    • http://prizinsta365.site/42038888066s0219.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418566/normal_5fdd416db4d3e.pdfIn PDF document text
    • http://shoop-fr.ru/julie_sanchez_sharabijjx56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380699/normal_5ffd6682372c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482671/normal_5fc7e83733f1c.pdfIn PDF document text
    • https://musescorIn 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
    • https://s3.amazonaws.com/dowesitobuga/beat_pe_booty_song_hdyaar._com.pdfIn PDF document text
    • http://zubeleboju.epizy.com/falciform_ligament_of_liver_define.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/narolalaluvewazoduni.pdfIn PDF document text
    • http://gefetela.epizy.com/71947799302.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/ieee_algorithm_template_word.pdfIn PDF document text
    • http://jilovin.epizy.com/susedezivofasajufog.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/cabinet_battle_1_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBB 3136 bytes
SHA-256: 5c0553f442a93f5f8ff360bda6b4b11911ffa90e0f8a122bb913a22ae4833061
font_01_sfnt_off0000daff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFF 4632 bytes
SHA-256: 1c77d73d12a4b4b834ea5626fee9a7301193e185240e156e2463b501637e36b9
font_02_sfnt_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 11480 bytes
SHA-256: 01d039f401a6d584309918271767738487b947fb5583a0b95755510cb1bc84d7
font_03_sfnt_off0001112d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112D 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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