Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c8c57d79976395…

MALICIOUS

PDF

82.8 KB Created: 2021-05-12 20:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3f1f23e305b0f19b3e55249fe0b8d492 SHA-1: 201b11cce8c3d69337b5e654ba015a14af44b243 SHA-256: 63c8c57d79976395bbd77d9b37628a4849f0018c69a0f13053e2308159367b48
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, jumiwimov.ru, which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a malicious site. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing or malware delivery attempt.

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://jumiwimov.ru/strik?utm_term=traditional+project+management+methodology+pmi PDF link annotation
    • http://alcozerox.com/kb_article_word_templatedjft5.pdfIn PDF document text
    • http://ecoservice-vlad.ru/how_to_size_a_football_helmet96wow.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/xanuvur2wtcj.pdfIn PDF document text
    • http://55571.ru/wagikavad26eny.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/ede57737-3e59-4191-bfcc-b2df464eb044/tp-link_tl-wr710n_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c4520e-25c3-4e9f-88d3-9efe11660cde/super_sad_true_love_story_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/migomakijoxuri.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/guided_by_voices_tour_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/tri_fold_brochure_template_free_microsoft_word_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/pidanuzopusodefew.pdfIn PDF document text
    • http://rutipozi.epizy.com/44862394244.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/multi_point_inspection_report_card.pdfIn PDF document text
    • http://gowegonuma.epizy.com/flybe_hand_luggage_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/xanarirofanuw.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/bisifobewagagugadiri.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/chloroform_soluble_in_water.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 5224 bytes
SHA-256: 6c2f434c78a99470fdc0b9a0ab5ac5181928daaee30dc66cbe968c97d82c86b8
font_01_sfnt_off00010713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10713 11908 bytes
SHA-256: 653ae15b00e5663b002f719c417d29bd4cfbed5fb5afa8d7a5e3dbbd436f7605
font_02_sfnt_off00012fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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