Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de9432602652843…

MALICIOUS

PDF

81.5 KB Created: 2021-03-31 07:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f9e7fdc24ac75e5772fc3d031f81e92b SHA-1: 7d781e0cbed3b3ae22ded1dabb4248f873ca437c SHA-256: 2de94326026528431896ebf05b31cbef40c1533d2e12ab82823ca9231204432e
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, jumiwimov.ru, which is likely used for phishing or to host a secondary payload. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/strik?utm_term=is+duraflame+toxic PDF link annotation
    • http://pejazadajenatew.getenjoyment.net/how_to_metric_units_of_measurement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5fc909fa21f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449771/normal_60392c8442faa.pdfIn PDF document text
    • http://artistichomesolutions.com/business_communication_notes_b._comuu5ra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419628/normal_5fffcb2a51a28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500189/normal_600388c5b71c3.pdfIn PDF document text
    • http://bnl-jobs.com/washington_wizards_record_2021vn9rn.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/mefozatesemegeso.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/can_someone_notarize_their_own_signature.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/restore_craftsman_19.2_volt_battery.pdfIn PDF document text
    • http://natbeach.space/ham_oven_roasterym7nt.pdfIn PDF document text
    • http://bossyonlinex.com/97100261243isf39.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://s3.amazonaws.com/xupimaral/posakivapuforaxamanifevoj.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/how_do_you_use_oracal_651.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/38831048746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34a080ee-3163-49c6-a5ef-d200746d162f/the_types_of_engineering_drawings_used_and_how_they_interrelate.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/tatodezuguz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debaac9f-d7b9-4e9b-9fc8-7f174dfdd15d/gunademuwopofusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fe5e9f-40ff-48a8-9179-4fde27a0f25b/does_cassie_die_in_the_5th_wave.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC42 4948 bytes
SHA-256: 9935644e9791a68e835e7a14d2f5c5c005b07ce573699d9ac28d2ad9814a439c
font_01_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001059b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059B 10716 bytes
SHA-256: b01311d661eea6122a84002f368aa0caff61e95911ffaad4a4b7c299f7e276fb
font_03_sfnt_off00012a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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