Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc951b134633de71…

MALICIOUS

PDF

73.4 KB Created: 2021-02-19 09:28:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b2c1d21b04e0e646814bd779255e5477 SHA-1: 50e1e5d38d0210990586e7f90421832d2a423962 SHA-256: fc951b134633de7160015c65ce0452b1fb12b5e83139860af7bb5ba2c146e8d3
154 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains embedded URLs, one of which, 'https://crophysi.ru/strik?utm_term=best+innovation+ideas+in+the+world', is flagged as a known malicious redirector. The PDF structure and embedded content suggest it is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=best+innovation+ideas+in+the+world In PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/ijU6Oha/dj_music_mixer_player_software_free_download.pdfIn PDF document text
    • http://lalat.space/78484383873lyhtx.pdfIn PDF document text
    • https://cdn.sqhk.co/burajugi/blADstd/87403017794.pdfIn PDF document text
    • http://gsmall.space/5765626840rffx.pdfIn PDF document text
    • http://galoomer.online/60123976937lq7yz.pdfIn PDF document text
    • https://cdn.sqhk.co/gunonutib/G8gi1ja/odds_calculator_fractions_to_decimals.pdfIn PDF document text
    • http://baltika-trans.com/les_territoires_de_la_mondialisationxjzot.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/hgcidcb/yes_that_dress_apkpure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5fcc75b348b67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/indiana_plagiarism_test_answer_key_2016_quizlet.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/song_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/birthday_wishes_for_daughter_video.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 5116 bytes
SHA-256: d2fd1b13e1920d8cd3a7a03d508332fd536ceefac90124eabdf3952d5b98cf10
font_01_sfnt_off0000f65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 10112 bytes
SHA-256: a283549e38b7ea166d004816e8c14bdc1462629e3106c5025c92284b8764c93e

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