Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3011819730f663…

MALICIOUS

PDF

78.3 KB Created: 2021-02-26 05:54:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6c5161d561a326aac74b8e4aeb1429a1 SHA-1: 93af7a714d9e9168f60c2e11e5ff1d7aa18526c1 SHA-256: 4c3011819730f6630405a0735e5c2c0ab84de62faba7dde54cfa01ab2782a062
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF file was identified as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. It contains numerous external links, including a link farm to 30 other PDFs, and a specific lure related to 'Alabama tv guide'. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful websites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=alabama+tv+guide PDF link annotation
    • http://rekabiwuxu.22web.org/46707092504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11c5a530aa.pdfIn PDF document text
    • http://copyrights-notices-helps.com/character_emotions_chartxkgcw.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/zedilu.pdfIn PDF document text
    • https://ziwuvofoxovexo.weebly.com/uploads/1/3/1/1/131163777/jezanawazafidaboxif.pdfIn PDF document text
    • https://fidifeso.weebly.com/uploads/1/3/1/4/131408027/7065063.pdfIn PDF document text
    • http://petonopelun.iblogger.org/wudojotapibovemebemi.pdfIn PDF document text
    • http://nesobaka3.xyz/rockwell_hardness_test_lab_report_introductionp0gc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_600a6c363af98.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/clgedhd/car_runs_rough_at_2000_rpm.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/jexijer/carte_calanques.pdfIn PDF document text
    • http://pegafiloxor.epizy.com/witchery_1._6._4_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/65644980357.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/burger_king_impossible_patty_nutrition_facts.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/62664698239.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_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 5060 bytes
SHA-256: eb04384c641762b5ac6db01b2d26322b08a1f48d259a32d9b7a197ce667d7019
font_01_sfnt_off0001079f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 10704 bytes
SHA-256: 9298e541be620bf7678ecc5bcc6e048663d014badb15d7dfad5bcd874adcb970

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