Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3a503953fbb4a8…

MALICIOUS

PDF

80.3 KB Created: 2021-02-17 16:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: c9005047842dbf2a83f64040a934bd06 SHA-1: 202120fa733046e49dea17dc61925ea2b71120bb SHA-256: 2e3a503953fbb4a8284a1bb1a1348f33482b7d2b68da3da60777362f91455a2e
222 Risk Score

Malware Insights

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

The PDF contains a link farm designed to obscure malicious URLs, masquerading as a driver download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that one of the embedded URLs, 'https://yafferge.ru/123?utm_term=hp+laserjet+4050n+driver+windows+7+64+bit', points to known malicious redirector infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/123?utm_term=hp+laserjet+4050n+driver+windows+7+64+bit In PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/1026877.pdfIn PDF document text
    • http://mon-cmbretagne.best/54781295319y9ag2.pdfIn PDF document text
    • http://esclub.pro/zara_cyber_monday_discount9p2hy.pdfIn PDF document text
    • https://xokewetabido.weebly.com/uploads/1/3/1/8/131857041/3827736.pdfIn PDF document text
    • https://begiruxuvasepi.weebly.com/uploads/1/3/5/3/135351124/6043191.pdfIn PDF document text
    • https://kuwupixunipava.weebly.com/uploads/1/3/3/9/133986845/mefagawugoxemem.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/d5dc568c98.pdfIn PDF document text
    • http://trendmobile.ru/52186172908d8jsk.pdfIn PDF document text
    • https://gorifimeti.weebly.com/uploads/1/3/6/0/136021085/fa37b651834.pdfIn PDF document text
    • https://zadejafiton.weebly.com/uploads/1/3/0/8/130813032/sonapexazemeduxakove.pdfIn PDF document text
    • https://jozufibajas.weebly.com/uploads/1/3/0/9/130969385/dusogokimijatuf.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/zosideratukojofu.pdfIn PDF document text
    • https://nikatomorufaxeg.weebly.com/uploads/1/3/1/4/131437252/8014dd6249b2ee8.pdfIn PDF document text
    • https://totakolexab.weebly.com/uploads/1/3/5/3/135391630/wakajo.pdfIn PDF document text
    • https://namavikevak.weebly.com/uploads/1/3/2/7/132740743/8836717.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/novipaliwid/core_java_projects_using_swing_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/aambala_movie_songs_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/pupuwelepowenerepatejim.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/norton_security_antivirus_premium_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/angielski_matura_podstawowa_gramatyka_wiczenia.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/89656537858.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_off0000f9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 5868 bytes
SHA-256: 2c3a2783eb509f1710d9ad159b07df006f388f9b5f4f4ae68b15bbbcccfbee50
font_01_sfnt_off00010df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF0 10416 bytes
SHA-256: 7c297c9815c16eeda41836ceb1a4e7f84787e928bfa90f89f4ad9c94ccb7a533

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