Malicious PDF — malware analysis report

Static analysis result for SHA-256 0203e50fdc86defd…

MALICIOUS

PDF

74.1 KB Created: 2021-03-05 08:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dd69a2006dd815c5b37d895056db8dfd SHA-1: 1d9a6e1e2ab0fc6e44119f37149b64c4c65cd654 SHA-256: 0203e50fdc86defd82e05b1e2115d298383f1193ff64565c7b2f416e32770c55
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-related, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and the PDF_URI heuristic point to the document's primary function being to redirect users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/award?keyword=paternayan+persian+yarn+color+chart PDF link annotation
    • https://cdn.sqhk.co/pawosuku/uReyzhb/miwofusadafirobu.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/TgczpJf/witubexetumexedisubabiza.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/eihdvFg/kojijeralogaxabulige.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/ihw7zqq/24038562022.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/bZBGg22/zurigakezomebelolin.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/eicKigK/perfect_scoop_coffee_ice_cream.pdfIn PDF document text
    • https://cdn.sqhk.co/bitubebo/RFiTynK/74424644746.pdfIn PDF document text
    • https://cdn.sqhk.co/pevizopubok/c6icgew/lebij.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/bjajdbT/full_name_for_kiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/CHSOtjd/free_joy_cross_stitch_patterns_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/niripakexad/ikifXoU/63352740259.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/9idhjjf/gitinota.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/VNwibAL/panizidolezudogo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/xogorumomumuruwasufozu.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/cholesterol_screening_guidelines_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2517de4-7e93-48ee-a53e-22b8a0e9e2bd/what_is_the_electron_geometry_for_h2o_molecule.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/minority_report_novel_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/shazam_apk_pro_2018.pdfIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_d1d55f56a35c40e39dd231f423b19ea6.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_f4dfc53486d64047a5d91fe2dfbc116f.pdf?index=trueIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_85f9b2aea4f34f5fa12a915865500209.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac72452c-7d30-4612-9526-bfe5950121dc/sugar_changed_the_world_free.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_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 5124 bytes
SHA-256: c43ad4f672590eb442134530ce012b5454c93a1381d98ceffe70a2b9b5b51b32
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 10980 bytes
SHA-256: 7075dce43fda46b1f196a7fcc12632f65cbf6e13030e7ca7eaa1b6179795fd03

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