Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e85a344bfaf2a2…

MALICIOUS

PDF

78.8 KB Created: 2021-05-11 10:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8f3a3b5297667d796743ea2d3bf445f7 SHA-1: 46e600d822d1a0ffad9d05a242ff73e75254eb02 SHA-256: e0e85a344bfaf2a2841e5ff16d521d840aa6380c892372929cbe62dbcc4666e8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The PDF contains a high number of embedded URLs, many pointing to disposable domains, indicating a link farm or redirection scheme. The presence of external URIs and the ML classification strongly suggest a phishing attempt, likely delivered as a spearphishing attachment.

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://seumenha.ru/strik?utm_term=hp+pavilion+27-xa0036na+all-in-one+desktop+pc+review PDF link annotation
    • http://prognoz-football.club/484422018392hmz2.pdfIn PDF document text
    • http://tuvexiwegivuke.iblogger.org/nurozusulomaligo.pdfIn PDF document text
    • http://azorocheat6.xyz/99050158891ilm7k.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/chgjahP/modern_combat_5_esports_fps_pc_size.pdfIn PDF document text
    • http://formblckr1.xyz/kobavomubusimedumoxidexedt0kqc.pdfIn PDF document text
    • http://jiwitoletazadag.iblogger.org/gaap_guidelines_for_depreciation.pdfIn PDF document text
    • https://cdn.sqhk.co/bikugipozamu/idAhyjj/furniture_design_jobs_nyc.pdfIn PDF document text
    • http://mx50off.info/whirlpool_top_load_washing_machine_drain_pump73moq.pdfIn PDF document text
    • http://complerbnp.com/59134042892tics4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujozitovisiwud.rf.gd/jojodemoloz.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/dekolunebumemusaminofo.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/wawodobabizigo.pdfIn PDF document text
    • http://xigitada.rf.gd/delenijupijemegon.pdfIn PDF document text
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_c0a0f940694a41ee94bb87e649e44a40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a8ae0e0-0ad9-4fec-9a0a-96c2f71cd609/why_does_my_verizon_mifi_keep_turning_off.pdfIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_c509f8b89ba04e40963019a1af74bb2d.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_efee354059a44b5fa8f7dc5ea700596b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8cbb2d-ee38-491a-9d04-b73a1e28362f/how_to_open_schlage_deadbolt_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78f8a16-4fe9-43f2-98c0-d90db38b566a/o_praise_the_name_of_the_lord_our_god_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/lymphatic_system_and_immunity.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_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 6016 bytes
SHA-256: a19cef701f02b5e72ab29e2586193bdb826795f92d54665e8a8f258e306000f3
font_01_sfnt_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 10880 bytes
SHA-256: 744289663cd175bf61dc8a509742aeb28b6320b4086b179859e659e27b882056

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