Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f278436ba90f46d…

MALICIOUS

PDF

78.9 KB Created: 2021-02-16 17:02:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6fd9cd2fa73ede3ec9307a006666f679 SHA-1: 523e3c55118b3cb0b4618497fed12b13476d5fda SHA-256: 5f278436ba90f46d52ac22ca35a9938b40e0c1dec209bc6cf16e692233f51303
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that directs users to a page with a title suggesting a guide for visual analysis, likely a lure. ClamAV detected this file as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious. The presence of embedded URLs and the phishing detection strongly suggest a malicious intent to redirect users to potentially harmful content.

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://druttle.ru/123?utm_term=how+to+write+an+introduction+for+a+visual+analysis PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467561/normal_5fce493adf988.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetovukufo/gjjU0ex/uk_domestic_electrical_wiring_diagram_symbols.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/Cy5jfjD/dungeon_crawl_stone_soup_sound_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Qiiibgc/88213023274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fcedc591d7dc.pdfIn PDF document text
    • http://tk-pobeda.site/oreo_8_icon_pack_pro_apkvpkaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421478/normal_5fdb2a1f79474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_600c6ddc4e1c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480389/normal_5fe39fa4af4db.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/MhgGPjc/dj_sound_mixer_price_in_pakistan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_5fd7d49786c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5fd345686e4ac.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/ghgdhjg/94686227459.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/wGDjcaE/k_health_telehealth_primary_care_physicians.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/hgvzhdb/rayman_jungle_run_apk_revdl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371005/normal_5ff5f0c015077.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://terezeso.epizy.com/greenwich_village_nyc_self_guided_walking_tour.pdfIn PDF document text
    • http://wijotifiku.rf.gd/street_fighter_gba_rom.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 5232 bytes
SHA-256: 65d3d5ece1496648c6381cd29d0f129356715116f653985090afc4cba5d24123
font_01_sfnt_off00010a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A26 10456 bytes
SHA-256: bfe16c237a55b966f7ee22286178a4b43ff708a2ef28c0ed8a859fc1c12e1ecc

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