Malicious PDF — malware analysis report

Static analysis result for SHA-256 453514ef4132949c…

MALICIOUS

PDF

70.6 KB Created: 2021-03-14 06:32:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: a0552e64b826e276539f1533619691bb SHA-1: edbc5af4a8419804df65055d0ec05243abfa76da SHA-256: 453514ef4132949c24a89552ab576c7f3f332b91e850458309fcfe6978d73fab
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, likely intended for phishing. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://jottigo.ru/strik?utm_term=northouse+leadership+8th+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381539/normal_5ffdfe1ea018c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381294/normal_5fc8b23a6f109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448332/normal_600908aa9e202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450440/normal_5fda831c40d2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5ff239b64afcd.pdfIn PDF document text
    • http://solimurelorobiv.iblogger.org/kaguvenikixoju.pdfIn PDF document text
    • http://nozipomak.iblogger.org/jopoberusanenereponefe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_5fd621d6dc848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_60317828ae388.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/9615665.pdfIn PDF document text
    • https://xudapugi.weebly.com/uploads/1/3/4/7/134702609/wumajegikobusit.pdfIn PDF document text
    • http://vemonubamupol.iblogger.org/how_to_scan_pokemon_cards.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofupiwosilabo.epizy.com/excel_templates_organizational_chart_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb56139-eaff-4d6a-96b6-7923e11d2020/zopomivuzilidofezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/722e306f-955b-40ea-a0f2-9d815a6af98c/duxirali.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/assume_form_james_blake.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/vegiwojepofetezibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d1d047-503f-4bdb-97b9-785a4e67db2c/37855494414.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/bieap._gov._in_login_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/airnav_radarbox_software.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/how_many_warriors_books_by_erin_hunter_are_there.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3d8dc1-6170-44c0-910c-a4570469db40/how_much_does_an_indie_game_cost_to_make.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bf8198e-60bf-4790-b0a4-c2d4f8c93a83/hot_briquetted_iron_hbi.pdfIn PDF document text
    • http://dapuseda.rf.gd/netflix_premium_apk.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_off0000d83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83F 5292 bytes
SHA-256: 89356abe45c60ded055ec71082db46ee7b28956a0b6a63721b91eb2f4ddde6ec
font_01_sfnt_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 10192 bytes
SHA-256: ee3ba6c86b42a39b707662c886a92c7ce403a8ea4237249f24c6f93de6fa2319

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