Malicious PDF — malware analysis report

Static analysis result for SHA-256 145f7349b7804440…

MALICIOUS

PDF

75.9 KB Created: 2021-02-19 23:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f8207a294f9f9c5bdc1f04ac3fd30511 SHA-1: 0967593175cfb57f809da583b8bf1e89403ae1d1 SHA-256: 145f7349b78044409ce89541465c7e240d79d49c8b3bfd2c135c52813176d286
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The document body, though heavily obfuscated, contains text related to online business podcasts, likely a lure to disguise the malicious intent of directing users to external URLs.

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 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://bologen.ru/123?utm_term=best+podcast+for+starting+an+online+business PDF link annotation
    • https://cdn.sqhk.co/kufomopinu/VSFhjgh/crusader_kings_3_how_to_win_battles.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/ggeiiic/30725863734.pdfIn PDF document text
    • https://cdn.sqhk.co/jomonufo/fy5DYje/leap_of_faith_meaning_in_bengali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_6022e60bafe38.pdfIn PDF document text
    • https://cdn.sqhk.co/mojikeke/Xz56Voq/background_hd_wallpaper_for_photoshop.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/fkbL0ih/vosuxudipoda.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jeploie/17967644246.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/iHhOjbg/thompson_thrift_jobs.pdfIn PDF document text
    • https://cdn.sqhk.co/jokawefezo/XifliiX/34412725639.pdfIn PDF document text
    • https://cdn.sqhk.co/kemivabesu/gfCW0ji/truck_simulator_europe_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/gfDjfAW/2018_defender_hd10_for_sale.pdfIn PDF document text
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/subeluw.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/ijicibn/magic_piano_pink_tiles_music_game_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_5fd84e213b124.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivefujowopigu.epizy.com/what_is_meant_by_effective_classroom_management.pdfIn PDF document text
    • http://dujibagakag.epizy.com/60884903579.pdfIn PDF document text
    • http://mufozugiro.rf.gd/8847053395.pdfIn PDF document text
    • http://gagelenobom.epizy.com/filing_a_police_report_austin.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_off0000e963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE963 5512 bytes
SHA-256: 714cab72554a8575af2ec1573a422b4613e3542b235533b6c809219b496d4eae
font_01_sfnt_off0000fc33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC33 10992 bytes
SHA-256: 7ca179a452f7374ba1b8276311901c7ed9d3c1198653ef3ef4b00d604aedc2bd

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