Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e906d7e96c4781c…

MALICIOUS

PDF

71.5 KB Created: 2021-02-20 13:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 82bb11348629872ecbb1237f3e095133 SHA-1: d0df60565f337559c433b2d12611cd28822d1160 SHA-256: 9e906d7e96c4781cd58a6389b744ed7b5a9b64a2f3c94ad863e07e1571ca0a80
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, including one pointing to 'baarspo.ru' which is likely a phishing or malware distribution domain. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to car sales, suggesting a lure to a malicious site.

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://baarspo.ru/123?utm_term=2019+tesla+model+3+long+range+for+sale+near+me PDF link annotation
    • http://netzamka.ru/pdf_nclex_review_questionskfjxz.pdfIn PDF document text
    • http://sale20.site/800480965218xhju.pdfIn PDF document text
    • http://zijimesaxa.iblogger.org/vcl50._bpl_windows_8.pdfIn PDF document text
    • http://jakartapro.xyz/46691913182y17s9.pdfIn PDF document text
    • http://solapp.xyz/how_great_is_our_god_chords_ukulelen7q6d.pdfIn PDF document text
    • http://smartline58.ru/guzugelinizuxanubekixu46rbx.pdfIn PDF document text
    • http://pusuwanoxanopo.22web.org/garrard_401_mounting_template.pdfIn PDF document text
    • http://s-tochka.ru/dish_network_channels_lostet6mw.pdfIn PDF document text
    • https://cdn.sqhk.co/libidexa/hgjecgg/libur_lebaran_in_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jalameki.epizy.com/bubunuzojamositarubex.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/axillary_lymph_node_dissection.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/android_phone_check_for_app_updates.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/excel_vba_format_function_date_time.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/zoxabud.pdfIn PDF document text
    • http://fizufanotujo.epizy.com/bhajan_dj_song_mp4.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_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 5780 bytes
SHA-256: bdcfa1204c03647ca016a028b8eef98f45c08bfd4d8461248468fcda4535a905
font_01_sfnt_off0000ecc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC4 10660 bytes
SHA-256: 2c648cd857414ceba3825f12b4df4220af7862d19bf5bbe657534fd304d61469

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