Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac189e51cf32469…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 04:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 54abbd52be06619d1aef851e9912e7b0 SHA-1: 5c558ff5a054bc7c180c69191407f6b78d895bd2 SHA-256: 5ac189e51cf32469d2da2ea7bf3eac12a068ae796e8846d99885421cce1f3907
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/wix?keyword=hitchhiker%2527s+guide+to+the+galaxy+ending+explained PDF link annotation
    • https://vebupixe.weebly.com/uploads/1/3/4/8/134854050/fumadi-tosatelidut-duberolonu-nizugep.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/dujuwudoka.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/hgifjgN/dice_tower_kickstarter_2018.pdfIn PDF document text
    • https://madimikelijexev.weebly.com/uploads/1/3/4/7/134717844/6959276.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/ageO3jc/xikunejezif.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/sasufufa/supply_chain_management_certification_courses_in_delhi.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/how_to_install_aprilaire_500_automatic_humidifier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4578a54d-5762-45ef-b22f-1294f1658cc5/how_to_reset_samsung_dryer_vent_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/toxamesimofipelenujike.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/fascial_stretch_therapy_benefits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493432aa-08da-438c-a533-7f03b63c112a/casio_w-800h_watch_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80bc3fe-d548-45c6-998e-ef7908e64ab6/60389708682.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/dapulovanifatolap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef76f7-73ad-4543-b8d0-289a0c3a671c/91932767071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427f88b4-d1fb-4bf5-87e4-b1126b9362e3/21278961777.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5080c6ab-7629-45eb-8af0-d4b263ba15d0/vujumixosanaxuwawifuwipo.pdfIn PDF document text
    • http://zunedolu.rf.gd/letevefitijise.pdfIn PDF document text
    • http://xetixeguxiji.epizy.com/air_ticket_booking_form_format.pdfIn PDF document text
    • http://fajufavutipo.epizy.com/50401618891.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_off0000f3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A2 5564 bytes
SHA-256: 56d56129cf8d39df71e75b8870d6afce8f59b8f17b4a7fb4104735151f1eb7f8
font_01_sfnt_off00010699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10699 11240 bytes
SHA-256: 4b1fc07b85fba9a78663f16ae333bd1c8292ed2f872eff51f9f033524805b484

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