Malicious PDF — malware analysis report

Static analysis result for SHA-256 43c29671e83b257d…

MALICIOUS

PDF

82.9 KB Created: 2020-11-21 15:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 63e9a3a35ca681c5fe6b071ebd69edd2 SHA-1: 11771404e7a43564fbcb15d6a3b176a21877df32 SHA-256: 43c29671e83b257d2f61730de23334603c7258e320059b444e44bcb0bd747e02
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 0.9997

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://traffnew.ru/123?utm_term=marshall+mcluhan+understanding+media+the+extensions+of+man+1964 PDF link annotation
    • https://labuxodapiju.weebly.com/uploads/1/3/4/4/134492440/xopenalejebik.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/zoninumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/badodemebo/dickens_beware_of_ignorance_and_want_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/girl_scout_cookie_fabric_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17d4716c-3c59-4ef3-a1a4-54f64f480009/skyrim_powers_of_elements.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/bi_weekly_calendar_template_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60112517-db9e-4ba5-af50-186a9769f2e3/babaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3dfbbf4-ce4b-4c4f-bcd9-5f13c06e954a/pasaviwokitijaxenifem.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/mental_ability_test_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/rasol.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/nikasefagupukonin.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/mezitikivut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7425b5cc-4f3c-4ad5-a5d9-b43671800ef9/logan_swim_and_tennis_club_youngstown_oh.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 5840 bytes
SHA-256: 6a5f572dcdca98ffed14b59ed7f5512cec0bbbfe0d0981ffc674abca3f2147e4
font_01_sfnt_off00010c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C63 10384 bytes
SHA-256: 6e1d5237cf65f9841965584686e3cf026a4b0ab21ee26d3a1794538ba89e9eb7
font_02_sfnt_off00012fca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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