Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea414fd3924a75f…

MALICIOUS

PDF

83.3 KB Created: 2021-04-02 00:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f3fcc77895302716619cbae7df5986e3 SHA-1: e8c3e56b8b753109a14bcfc182167335a9100e9a SHA-256: 7ea414fd3924a75fbe2f2300b1fe3f62c8dd565df8e6167cdb526407dc0e2caa
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs likely serve to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/strik?utm_term=mackie+802+vlz4+review PDF link annotation
    • https://zubenori.weebly.com/uploads/1/3/5/3/135394140/c2709f78be42c74.pdfIn PDF document text
    • http://tevituvodejifep.mywebcommunity.org/mugipix.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/2168027.pdfIn PDF document text
    • https://zosojelukik.weebly.com/uploads/1/3/1/8/131871698/gomanedoraraxiza.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/4358439.pdfIn PDF document text
    • https://gilawidukawopux.weebly.com/uploads/1/3/2/7/132741225/xuwijawibutapud.pdfIn PDF document text
    • https://pilimulifedi.weebly.com/uploads/1/3/4/8/134852071/9245132.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/xotusiw.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/jozinuzipo-negumajijeg-zoboko.pdfIn PDF document text
    • http://jiwipetafexob.iblogger.org/what_causes_infj_personality.pdfIn PDF document text
    • https://kubojetezeb.weebly.com/uploads/1/3/4/5/134586336/3944695.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/dell_ultra_hd_4k_monitor_p2415q.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/8091bb57-b8f8-47b7-9ff3-8bd5662cb6aa/zufatewisugubufejowufilar.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/pugixevavilixatajadiwilo.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/oecd_guidelines_personal_data_protection.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/54367722178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c415e66-8adc-481f-a55f-aa3db333a4ad/gujawamukazeka.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/87836331628.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/broadband_and_upload_speeds_explained.pdfIn PDF document text
    • http://zotomogizolelaz.rf.gd/10704364973.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_off00010583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10583 5444 bytes
SHA-256: 16b90464b2320d1fc23e2948fa7a75517958e30d5f72648e79417d2f4d3f489b
font_01_sfnt_off0001184b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184B 11628 bytes
SHA-256: b1c19b2c088988d6b3d2c034a781e138ef08a81f30375f7f4f4f69774642f255

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