Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f4c47a172e5812…

MALICIOUS

PDF

74.0 KB Created: 2021-02-27 12:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 893619648d036f7fd62d42512a631013 SHA-1: 0f7dba8b21481d4bf37297e7bee7ae7b96e282f5 SHA-256: 45f4c47a172e5812fd69e2ded2bfb8497a134cff2fc133498d3f8c5a106fd6b9
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', with one prominent URL pointing to a driver download page. This heuristic, combined with ClamAV detection and ML classification, strongly suggests a malicious intent to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and the nature of the links indicate a likely attempt to deliver a malicious payload or facilitate phishing.

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
  • 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://ponafet.ru/123?utm_term=intermec+pm43+driver+download PDF link annotation
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/zukeroxamenod.pdfIn PDF document text
    • https://cdn.sqhk.co/bosejadukifo/ZG4i1np/parkour_maps_for_mcpe_apk.pdfIn PDF document text
    • https://fuvapele.weebly.com/uploads/1/3/0/7/130738919/zudejumoramifubumave.pdfIn PDF document text
    • https://cdn.sqhk.co/fijufupuga/jjieEig/classroom_dojo_images.pdfIn PDF document text
    • https://cdn.sqhk.co/zijigemeworu/fgjhege/titagesetawetadazo.pdfIn PDF document text
    • https://sinemitivivofa.weebly.com/uploads/1/3/0/7/130740142/3692812.pdfIn PDF document text
    • https://cdn.sqhk.co/lunexubafexo/3jcicjj/14315246219.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/9QhhCii/bank_of_america_mobile_banking_problems.pdfIn PDF document text
    • https://wagezulixi.weebly.com/uploads/1/3/2/6/132695300/45168e90.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/liwunukexudenafokebo.pdfIn PDF document text
    • https://cdn.sqhk.co/bibunifez/R0QD0BU/9715162350.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/xavije.pdfIn PDF document text
    • https://cdn.sqhk.co/jamasedese/gd0sl7L/sniper_zombie_apkpure.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/suxuzubojut/robot_vacuum_cleaner_price_in_bangladesh.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/how_to_clear_driving_directions_in_google_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/40978777322.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/high_school_report_card_samples.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/sawubik.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/anima_beyond_fantasy_book_list.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/vuxirutotoronuxi.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_off0000e430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 5380 bytes
SHA-256: dc359d702f4229ede1c8b24f858725a774356a2cb085d8873934a4c3acf3271a
font_01_sfnt_off0000f685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF685 10748 bytes
SHA-256: 99ff50f2bb88b8afc69fb206b3815e2ed24d4df186a9658444d77a1330ceede3

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