Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab50b81be7b4c9d…

MALICIOUS

PDF

131.7 KB Created: 2021-02-16 10:03:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b0e2ecb60d2632196f3c93a303075682 SHA-1: d69367290d6beb73b4007509f2141f78f9feee3e SHA-256: 8ab50b81be7b4c9dcf058112d5429bb2187ab75e9b5c82ae15ef30d1a7ba1d82
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to a search query, directing users to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/123?utm_term=what+does+neo-gothic+stand+for PDF link annotation
    • https://cdn.sqhk.co/risenulowo/Cfij50t/53045617341.pdfIn PDF document text
    • https://cdn.sqhk.co/toxodabatot/ghgcge5/xuxexozuw.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/1864737.pdfIn PDF document text
    • https://cdn.sqhk.co/faxenukev/iaijXmG/rumulujakakosufizalerafid.pdfIn PDF document text
    • https://cdn.sqhk.co/jasurisunav/iagfgfJ/saudade_tattoo_script.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/bgggfiV/download_the_world_ends_with_you_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/polirorenu/deOibpz/thrift_stores_in_nj_bergen_county.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/jdnhegV/sumemowukegijalurakuzug.pdfIn PDF document text
    • https://votobadopa.weebly.com/uploads/1/3/1/4/131483772/jetusat.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/S8hOyH0/football_games_penalty_shootout_world_cup_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/idjaVQB/8488125303.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/ji5ihzl/raludizumeropirorefimiwit.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/tinivukedeta/53428861944.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/spyglass-_guided_electrohydraulic_lithotripsy.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/giwatifo.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/concise_english_grammar_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/25936637606.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/blades_in_the_dark_v8.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_off0001c1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1DE 5296 bytes
SHA-256: 70568aea82836118cd4ea7c15b4e83876e82c05a084f67b60ade85195a4d11dd
font_01_sfnt_off0001d3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3F4 15256 bytes
SHA-256: b26337f3077a733654bbc3d583f24e4085bfe2addbad5e3d659603f63629531c

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