Malicious PDF — malware analysis report

Static analysis result for SHA-256 28daae77e903b95c…

MALICIOUS

PDF

81.5 KB Created: 2021-04-20 18:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 00525aaad99d9ac74c7a8f12b7190a52 SHA-1: dd62d39686e687074966ba48f0873a07fccb8dc9 SHA-256: 28daae77e903b95cdda88b0786c1afa6d2dcc602b6be86bea5f7525477cc2484
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit the user through a deceptive lure.

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://golowaki.ru/strik?utm_term=petsafe+pet+containment+system+transmitter PDF link annotation
    • http://filozajerezabi.getenjoyment.net/godfather_coda_death_of_michael_corleone_wiki.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/how_to_calculate_gas_flow_rate.pdfIn PDF document text
    • http://how2clever.com/423642780022hyz1.pdfIn PDF document text
    • http://antinomi.design/what_does_the_word_listless_mean_in_englishuoeh7.pdfIn PDF document text
    • http://zajodas.iblogger.org/73037345782.pdfIn PDF document text
    • http://tasigezagu.scienceontheweb.net/fuzubukepisibepununananej.pdfIn PDF document text
    • http://fikapopupalake.iblogger.org/aditya_birla_mutual_fund_redemption_form.pdfIn PDF document text
    • http://creditinquiry.info/english_writing_skills_course_freea7f46.pdfIn PDF document text
    • http://tipografiyav.moscow/haruki_murakami_schedulet6744.pdfIn PDF document text
    • http://kefisuful.iblogger.org/60283323598.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/wuvepilamamuse/67770735936.pdfIn PDF document text
    • http://leparitupoxow.onlinewebshop.net/zozeturugipirujarunikewaw.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/66735534723.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/wopoj.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/wuxelezakifumo.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/73484273669.pdfIn PDF document text
    • http://mugomodag.atwebpages.com/forunosusemijeserojuwoj.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/chiro_sathi_bengali_movie_songs.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/vonefagelibebam.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_off000101ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 5232 bytes
SHA-256: 8490125b0e36e0d70b1e6a21a2b34d4c8f37497aa53d97453f335ca2abc28549
font_01_sfnt_off00011379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11379 10840 bytes
SHA-256: d61289f9fbd25e540dc196c4bba857aab195e023ec8e640830187dc4a9bdd8e4

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