Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b09659d602f1f37…

MALICIOUS

PDF

62.4 KB Created: 2021-01-25 06:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d22cc281ba8f659f7a8558218a2820ad SHA-1: 7eb0882755130b6699785060132c187f924f24f2 SHA-256: 5b09659d602f1f37e5c4df5013c5b1ecae23130874832b534b4fa9ecc5150175
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were directly extracted, the presence of embedded URLs and the heuristic firings suggest the document's primary purpose is to redirect users to malicious infrastructure.

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/123?utm_term=rituals+of+memory+story In PDF document text
    • http://gakivako.iblogger.org/zalonalobulodixekob.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/9832293.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485004/normal_5ffc01891b4a1.pdfIn PDF document text
    • http://fufivepibagat.iblogger.org/seoul_metro_map_2019.pdfIn PDF document text
    • https://xupemapimosow.weebly.com/uploads/1/3/0/7/130776757/a6175fd.pdfIn PDF document text
    • https://cdn.sqhk.co/bulamije/uXgnvii/cold_war_open_beta_date_ps4.pdfIn PDF document text
    • http://siduwukalupi.22web.org/love_story_whatsapp.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/jejbgdT/samsung_notes_update_unknown_sources.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vuremekewema.rf.gd/gupelegomasetinifatoleju.pdfIn PDF document text
    • http://ladorum.epizy.com/video_player_android_example.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/roguxepiwu.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/cancionero_para_guitarra_rock_nacional.pdfIn PDF document text
    • http://gadudadu.rf.gd/42229994104.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/jesajujenejavazubuwupenix.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/jigobugebokiw.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/microsoft_access_tutorial_2007.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_off0000bbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC7 5020 bytes
SHA-256: 1b0c225f494ff41acacc50863a56016b144f5ea84db0eb50ad41720d35a146d9
font_01_sfnt_off0000ccce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCE 9348 bytes
SHA-256: 8ed28de1ab577380dab58a0238a256e10ebe512b25c283b9971560083389c190

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