Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7d2cd956e8141c3…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 01:07:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9e7a15c1cced3f94d80de3c760aee3ab SHA-1: 1057ba2738ba24a9e356e4461096b04cb70d4363 SHA-256: a7d2cd956e8141c31b1012d01e4dc767446dfab2cc41054640e30f93aa189ef2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to a 'study guide answer key'. The presence of external URIs indicates an attempt to redirect the user to a potentially malicious site, likely for phishing or malware delivery.

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://maypoin.ru/wix?keyword=unit+8+study+guide+answer+key PDF link annotation
    • http://mikovil.mywebcommunity.org/dunkin_donuts_wake_up_wrap_turkey_sausage_calories.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/kiposefedosevakozadebop.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/bukhari_shareef_ki_sharah.pdfIn PDF document text
    • http://stopnutristrike.ru/4612484225452yx0.pdfIn PDF document text
    • http://dkmz3.club/graco_fitfold_jogger_travel_system_reviewsvfa92.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/kiguteperilodu/nedujoloxezovaxokuwikomug.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/books_of_the_bible_list.pdfIn PDF document text
    • http://zotibulavozixu.rf.gd/anti_rabies_vaccine_in_pregnancy_guideline.pdfIn PDF document text
    • http://wegoxoxajenugol.rf.gd/95773413941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2ed871-2741-4f8d-8e16-743fd3c65015/tinudupemuro.pdfIn PDF document text
    • http://jonesojawu.myartsonline.com/characteristics_of_partnership_form_of_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b84c43-b252-4d4a-b513-663a4b8c4dee/330725018.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/tunevutazipofabewimuz.pdfIn PDF document text
    • http://fibafewupo.epizy.com/wixevagiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3af73b-e6ca-4cc8-b087-fdb4eafedc00/19825909149.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/coordinating_conjunctions_worksheet_8th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7058b40f-ee7f-4da8-aab1-36bb5f27888f/mabot.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_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 5404 bytes
SHA-256: 9ae85c1162b5ab7d27e847629b69ebc02681120192fe2c76e9b5385eda8f2b0f
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 10576 bytes
SHA-256: 440d16e5e9bf2f172410685e36f2bded2a696f306f2a1856bfabaa1c6879b099

Open this report in the interactive analyzer, or submit your own file for analysis.