Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94766750da8f61c…

MALICIOUS

PDF

77.7 KB Created: 2021-04-03 01:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 14ef9dcdc6549d15096a5d83d89c6d56 SHA-1: d139c5e84f5843da2a22ac1cc285c44a930999d8 SHA-256: a94766750da8f61ce1a42143fd09345a95d088e8af6b7a65a7d53a00988c5d25
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a high concentration on disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs further supports a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=how+much+is+1+lb+of+sweet+potatoes PDF link annotation
    • http://irisca.online/kaxawufozojinikizurukiym4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415052/normal_60092e28e4bcc.pdfIn PDF document text
    • http://itdiscount.info/att_1040_caller_id_setup9s65e.pdfIn PDF document text
    • http://pumujavebedopa.iblogger.org/26_gauge_galvanized_steel_sheet_cost.pdfIn PDF document text
    • http://pixxel.life/building_outdoor_shooting_bench82ojz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_602ed137276b6.pdfIn PDF document text
    • http://damizav.iblogger.org/divogekulofivoporixim.pdfIn PDF document text
    • http://accueilcmb.com/craftex_drum_flap_sandererhqz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_5fe8ff0f6ee9a.pdfIn PDF document text
    • http://gotiwekiz.iblogger.org/35200287005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_60436086a5bf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gasotakibuw.epizy.com/76277562707.pdfIn PDF document text
    • http://weloridotam.epizy.com/adform_rest_api.pdfIn PDF document text
    • http://vujiwexamofone.rf.gd/mimasilaxo.pdfIn PDF document text
    • http://rimalapotozuf.epizy.com/graphics_cards_vs_performance_comparison.pdfIn PDF document text
    • http://jifexizeji.epizy.com/acrobat_reader_10._1_4.pdfIn PDF document text
    • http://rasunafosav.epizy.com/filmywap_2018_bollywood_movies_full_hd.pdfIn PDF document text
    • http://sakupoje.epizy.com/solving_algebraic_equations_worksheet_5th_grade.pdfIn PDF document text
    • http://dikuwipesunebo.rf.gd/15112853178.pdfIn PDF document text
    • http://zekovulelopur.epizy.com/annotated_bibliography_apa_word_template.pdfIn PDF document text
    • http://pikamumoboxajis.epizy.com/76782287705.pdfIn PDF document text
    • http://reduwakofebej.epizy.com/privacy_policy_template.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_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 5404 bytes
SHA-256: f49654f232eae5b6b3c07b506d8e7e565ad0798d352d6967418fb1f88832600c
font_01_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 10552 bytes
SHA-256: 7cd3dc429c6f519a1b324e55a5590896268b561dc72f4d48ab3e553884fb3a27

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