Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c64d68ceb100466…

MALICIOUS

PDF

92.9 KB Created: 2021-02-06 02:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 77ac449250f1e7141b4200e2875dffce SHA-1: a3580fcdbb5b660f8fe26a00f4863a09c633f9ce SHA-256: 6c64d68ceb1004669ffca417d61078d3fe1da3f4b029722dd79c6f27134333f7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://crophysi.ru/aws?utm_term=canadian+buoyage+system+pdf`. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links suggests an attempt to lure the user to a compromised site for further exploitation, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=canadian+buoyage+system+pdf In PDF document text
    • https://jujoxiro.weebly.com/uploads/1/3/4/8/134875196/zoliku.pdfIn PDF document text
    • https://pixebekisutajud.weebly.com/uploads/1/3/0/7/130775176/c474e4.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/kavisowaguvutu-zowirodul-wosijexaz.pdfIn PDF document text
    • http://wtia.space/adagio_secret_garden_violine0agk.pdfIn PDF document text
    • http://vzruvayarttraff.xyz/world_leaders_2020_agesrlujf.pdfIn PDF document text
    • http://tokigarodam.22web.org/go_math_homework_answers_grade_6.pdfIn PDF document text
    • https://malolikekex.weebly.com/uploads/1/3/4/7/134718462/tiwegofajanerubopoj.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/ix6ihjb/vonima.pdfIn PDF document text
    • https://repamepofasepa.weebly.com/uploads/1/3/1/4/131437198/tanuzobak_zadisiju_foveluwemum_ladaponevezas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bezegoluzose/good_night_image_with_love_couple.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/risoz.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/81144358169.pdfIn PDF document text
    • http://parorusoba.rf.gd/tejajufalogi.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/vitizukawisimuwuje.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/86514912670.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/11670434479.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F1 5380 bytes
SHA-256: 1fd9b35a5ea565c645f10a1c919582b75e8b76f1ca9e2ea2cf491f4f1974dbfd
font_01_sfnt_off00013333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13333 10464 bytes
SHA-256: a1ae76a09132804d8f54d4de11d9f4325dbae64c396c700286b357a8429dcc2c
font_02_sfnt_off000156e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156E1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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