Malicious PDF — malware analysis report

Static analysis result for SHA-256 40452c9b91e77d5b…

MALICIOUS

PDF

80.2 KB Created: 2021-04-01 16:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 979e6f6456210fb5d568c0d3217023c5 SHA-1: 9230ab752aa0ed70af989c6f7f3311add5e4830e SHA-256: 40452c9b91e77d5b1fe57ef0352ac6c52e9150aeb121d053f9eecbfb0e067410
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_URI heuristic points to a URL that, when visited, likely serves malicious content or redirects to a phishing page, disguised as academic search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=principles+of+microeconomics+chapter+3+answers
    • http://kanaxade.mygamesonline.org/54547695502.pdf
    • http://reweder.site/dcs_930l_lb1lmoio.pdf
    • https://cdn.sqhk.co/devisojop/gjchfgg/vr_home_design_steam.pdf
    • http://mexicotop.xyz/how_to_check_business_credit_score_uk6ovbt.pdf
    • https://cdn.sqhk.co/bedimiwojam/jiieEH0/simplifying_algebraic_expressions_examples_with_answers.pdf
    • https://cdn.sqhk.co/paxepilekot/eTgdSVi/cricket_live_match_apk.pdf
    • http://leadtop.co/tiwiwosufugegotwowlc.pdf
    • http://teksalle.xyz/43619431412m8k9x.pdf
    • https://cdn.sqhk.co/dodirorip/Tg8Cd2B/company_of_heroes_android.pdf
    • http://dressnbuy.com/sukimumifesebufigiqpoou.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_d7c413367ef44577817de27908c7d032.pdf?index=true
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_39f37dea065944bf95d6546a98b49180.pdf?index=true
    • https://s3.amazonaws.com/jazamerijekufol/91457259103.pdf
    • http://positajugopisu.myartsonline.com/nigeria_biafra_war.pdf
    • http://jumawivowibeb.onlinewebshop.net/zarabavopesojef.pdf
    • https://s3.amazonaws.com/xezonijida/billian_billian_mp4_video.pdf
    • http://sowutafamewuben.rf.gd/ovarian_cyst_nhs_guidelines.pdf
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_c71f782abfc44d12a3bc53e1c93a1d41.pdf?index=true
    • https://s3.amazonaws.com/tikofaketonub/11523890247.pdf
    • http://dijazulebok.epizy.com/codewarrior_for_windows_10.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0eb.bin
06a845fdc3c58a69391ca9ea9249e6376e575081b74da850e8f126165fec78b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 5300 bytes
font_01_sfnt_off000102bc.bin
325f6264b9b2cf51d407131e3f809a9bc45edbf40b8d063adcb3f07a743dcf9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x102BC 10208 bytes
font_02_sfnt_off00012568.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12568 4324 bytes