Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e053de7fccddc8…

MALICIOUS

PDF

81.0 KB Created: 2021-03-24 10:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: af282449e7c47db8121c5d1345e64e07 SHA-1: 4d69cf78a31ea4306a2542fc15826b319cffb430 SHA-256: a4e053de7fccddc85a166cf614f7513ecc5a71639c71484b05455be5be4dbfc0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for free software, likely a lure to trick users into downloading malware. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The presence of multiple unknown URLs further supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/wix?keyword=xtra-pc+turbo+64+free+download PDF link annotation
    • http://pixell.store/5088595610gprb8.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/jggdMCp/52566447817.pdfIn PDF document text
    • http://navaram.online/dozafazirakavutuwimiqdd87.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/41824846264e3jh5.pdfIn PDF document text
    • https://cdn.sqhk.co/puroneruk/Mhhjagh/32559404190.pdfIn PDF document text
    • http://yatvoyya.fun/bozoratijb0htr.pdfIn PDF document text
    • https://cdn.sqhk.co/rabovafom/CijmApA/40533376253.pdfIn PDF document text
    • http://eroganoficial.site/calculus_for_the_life_sciences_greenwell_2nd_editionfvszf.pdfIn PDF document text
    • http://delayikapy.xyz/midobojovawaweyrfch.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/c8ozQGh/small_white_chicken_with_feathers_on_feet.pdfIn PDF document text
    • http://pinegrvuig.fun/fitivasaluxirupezepzdjtn.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/hcid4jj/41974516379.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b6e4fd8f-3962-406a-bf80-d52e7d43b6bf/cinemax_nitra_mlyny.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/programmable_logic_controllers_plcs_an_overview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/523139af-7090-4e22-b425-9e4750874348/59880191957.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/imdb_nappily_ever_after_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/62546413303.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/vilowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e36dfcb9-ee40-45f5-88e4-bfa44933be5e/wijokagovokusoziv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c142ae-d79c-4c3e-a7eb-423ed8644b42/comfort_furnace_infrared_heater_cf1500uv-wta_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13A 5288 bytes
SHA-256: b1811386d7ec16db6c01dcfdb0bbbe849dbea0dc0b882d5bfccf7e58971eddb2
font_01_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 11016 bytes
SHA-256: 2d6b378fcc85e4420e662c786783d8d51dfa5dd1d071f5f674c2b10d7c21ac12
font_02_sfnt_off000128d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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