Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cba2ea39ab16537…

MALICIOUS

PDF

71.0 KB Created: 2021-01-21 12:58:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6dcc660e8e0f993394a44d36848711f1 SHA-1: 2bd418da3cc0b2a046a71f9f916adb299fd66b45 SHA-256: 4cba2ea39ab16537849c08d9aaf49eb302da2078f201122301635106e37d1f76
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as a free download. This indicates a phishing attempt to redirect the user to malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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://traffmen.ru/123?utm_term=lego+batman+free+download+for+android+apk In PDF document text
    • https://cdn.sqhk.co/dixejetafap/0uifcgh/vefekemikorigobosafu.pdfIn PDF document text
    • https://site-1166704.mozfiles.com/files/1166704/felarilet.pdfIn PDF document text
    • http://wuwubaga.22web.org/cydia_tweaks_ios_10.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/birdies_wings_coupons.pdfIn PDF document text
    • https://site-1174284.mozfiles.com/files/1174284/the_trial_of_the_chicago_7_trailer_soundtrack.pdfIn PDF document text
    • http://xupenoxerukaj.22web.org/sean_doolittle_injury_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fe302b554172.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/nopomewegobij/patofisiologi_penyakit_antraks.pdfIn PDF document text
    • http://gobavaduxa.epizy.com/html_template_engine_php.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/34685698523.pdfIn PDF document text
    • http://gawexerexi.rf.gd/85686314522.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/arcgis_engine_developer_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/td_ameritrade_inherited_ira_distribution_form.pdfIn PDF document text
    • http://tetexabe.epizy.com/96555525720.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/cisco_networking_academy_packet_tracer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/bunker_fuel_analysis_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/jefazopan.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/jatt_ambarsariya_full_movie_hd.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_off0000d716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD716 5420 bytes
SHA-256: 4a793a5faa24fc9eb7f0b7aa5824f2655f3641c6603a2baeed77eda1937e15fc
font_01_sfnt_off0000e989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE989 10464 bytes
SHA-256: 12b5709ffe207962ef08de783b0763ad2b8ac18cdc513f7218afd789832dc942