Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8c0051f699fb3c…

MALICIOUS

PDF

108.9 KB Created: 2021-03-25 19:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14f49cc80a890bef8e96336ca5bc49d1 SHA-1: df0ba9402333a5fb230a0545df734d34135b3d4f SHA-256: de8c0051f699fb3cc8ba98061be29dee388e07f048f536cb6df0504a2ecc429e
136 Risk Score

Malware Insights

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

The sample is identified as a malicious PDF by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. The document body, though heavily obfuscated, contains references to 'factory design pattern' and 'pdf', potentially as a lure. The embedded URL `https://lozipotod.ru/award?keyword=factory+design+pattern+in+java+pdf` suggests a phishing or scam attempt, likely leading to a second-stage download or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://lozipotod.ru/award?keyword=factory+design+pattern+in+java+pdf
    • http://tesepaxe.iblogger.org/21907030743.pdf
    • http://zisuroto.mygamesonline.org/unitypoint_clinic_humboldt_iowa.pdf
    • http://zifasito.22web.org/resodikagebunekazok.pdf
    • http://vabademajelid.iblogger.org/punonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dojorunubi.myartsonline.com/66605887634.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/13241580229.pdf
    • http://vakogez.myartsonline.com/the_secret_life_of_pets_2_chloe.pdf
    • http://varoniwarovez.rf.gd/war_ambience_sound.pdf
    • https://s3.amazonaws.com/wegugus/what_is_coding_for_beginners_in_hindi.pdf
    • https://s3.amazonaws.com/patotale/3762903707.pdf
    • https://s3.amazonaws.com/paxuvagal/how_to_start_honda_gx390_pressure_washer.pdf
    • http://putojoner.rf.gd/advocate_personality.pdf
    • https://s3.amazonaws.com/gavapozalilup/kifides.pdf
    • https://s3.amazonaws.com/begijufadi/bhagavad_gita_sanskrit_gujarati.pdf
    • https://s3.amazonaws.com/tasufagijaremo/dancing_line_the_winter_piano_sheet_music.pdf
    • https://s3.amazonaws.com/runuzitexokol/67816916341.pdf
    • https://s3.amazonaws.com/bejexe/4895205402.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a60.bin
07dbac3a153f3ba02fcec8159a81ec2acbccad99725db84eeb7725519bd154bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A60 27772 bytes
font_01_sfnt_off00015899.bin
245780eff46e05562fb578ca9637ff68c14dd879d8d869564c21d9af1612b2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15899 5272 bytes
font_02_sfnt_off00016aae.bin
0c2335c63422904140412bc1531a0bac8a7907e2335185c273abfc7e9a3df18a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16AAE 14156 bytes
font_03_sfnt_off000197c8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x197C8 4324 bytes

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