Malicious PDF — malware analysis report

Static analysis result for SHA-256 33121f312323e718…

MALICIOUS

PDF

72.9 KB Created: 2020-12-25 22:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e89ea3ef2fdf7e346efefc0e8114ede5 SHA-1: 22d7ef37981130e24a39cabacc5508e768c6ff3b SHA-256: 33121f312323e718e253e756193f0ab4d890f64c2d9a31b7cda0d1886f017ffc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The embedded URLs suggest a phishing or link-farming campaign, aiming to direct users to potentially harmful content. No scripts were extracted, but the presence of numerous external links indicates a strong intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=brs+parachute+retrofit In PDF document text
    • https://cdn.sqhk.co/fekawifen/jhejbja/77363233416.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwisagilevi/RTsUgMe/44410382041.pdfIn PDF document text
    • https://ganulexotugoris.weebly.com/uploads/1/3/1/1/131164012/dbf340.pdfIn PDF document text
    • https://cdn.sqhk.co/fumazuri/fJgeoZ1/most_difficult_games_on_switch.pdfIn PDF document text
    • https://digagewopaloz.weebly.com/uploads/1/3/4/6/134634746/2cb5ed8b93dfdda.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/5b1ac405d.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/6680488.pdfIn PDF document text
    • https://cdn.sqhk.co/kosuxatune/ahjF9ig/wifi_analyzer_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95258999-315a-44e1-9d4f-e90c7ebcf9f0/kimosabileraxonalarigaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a40cccbd-9974-4fab-98ba-4abb68bca335/9759797276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b89003e-a8f0-45eb-98f6-35127645c942/suvibuwopefuzabubex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25170373-e130-4917-b9e4-5f312b2e8a39/kepuvosek.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_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 5120 bytes
SHA-256: da219de2062c75621fd4074db845c3a136570fec9df296e02dec68985cbae9e5
font_01_sfnt_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 11516 bytes
SHA-256: f7731d356802f3c273cf189ac3e36e8f20cf5d314ee82230a3f67ae369d8960b

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