Malicious PDF — malware analysis report

Static analysis result for SHA-256 a926743380122247…

MALICIOUS

PDF

65.3 KB Created: 2021-02-15 11:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1f4aa17e09647d92e96b877f23393b39 SHA-1: 0e881dc91791d8a77825522e465c5455e9e42ea2 SHA-256: a92674338012224728a57f01c6855068bd66cb862fc88abc62097e591a1c2f5d
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://yafferge.ru/wix?keyword=cmp3+grade+7+answers+investigation+1 In PDF document text
    • http://copytoshka.ru/volume_of_rectangular_prism_worksheet_free3r64d.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/1253464.pdfIn PDF document text
    • https://gotagifegu.weebly.com/uploads/1/3/1/6/131607164/kixemos_tazufuzapowis_vanalofi.pdfIn PDF document text
    • http://bella24.xyz/verb_adjective_noun_worksheetjuolc.pdfIn PDF document text
    • https://cdn.sqhk.co/kezixowog/Cjigcjf/math_games_online_2048.pdfIn PDF document text
    • http://belplitka.ru/libros_de_minimalismo_gratisvq9oa.pdfIn PDF document text
    • https://cdn.sqhk.co/feletitami/iheIi3Z/centurylink_outage_las_vegas.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/ii7bibe/rasoferun.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/hhh8giZ/rebemirovofuma.pdfIn PDF document text
    • http://7gusevshop.website/811576561474fio3.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/geKiccu/watch_marooned_with_ed_stafford_123movies.pdfIn PDF document text
    • https://cdn.sqhk.co/dixufeja/ic4ijWC/drift_max_pro_online_or_offline.pdfIn PDF document text
    • http://idealica-ufficiale.site/3848498212uej6p.pdfIn PDF document text
    • https://xiwabedosebu.weebly.com/uploads/1/3/1/3/131398066/sisup_sexiwi_ferojemo_didukizulinav.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/4cc32079b8.pdfIn PDF document text
    • https://cdn.sqhk.co/febowozefu/zoUicjd/90931312460.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/hs6WhdT/52795218645.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/pobixedele/news_broadcasting_script_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/gejasesonuleboxusebodowa.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/appropriate_workplace_behavior_worksheet.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_off0000c2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B0 5600 bytes
SHA-256: 73b98bbc5f019e3c4fdd3bbd6caa9e7c269c3a4016cc62dac896545de4e7f9e1
font_01_sfnt_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 9932 bytes
SHA-256: 72f2084bea4035622827b10576f140c01129debd64bac17e002fad7abb20d56e