Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca3d6f6d26920b2…

MALICIOUS

PDF

77.2 KB Created: 2021-02-23 13:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8d962b39009581ce27fde079bda951d5 SHA-1: b10be616661041cea6c4913060a72d5af8680000 SHA-256: 5ca3d6f6d26920b279183b4b4d23d78ee6aa01aeb5c4874cc0a15c388e715db9
156 Risk Score

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://jottigo.ru/strik?utm_term=hannah+arendt+the+origins+of+totalitarianism+cite PDF link annotation
    • http://4gusevshop.space/railway_reservation_form_format3wy7t.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/89de281c4bef.pdfIn PDF document text
    • http://netewe8.xyz/bivinerb55m0.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/dapekufoxiraku/72450870878.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/washington_dc_weather_january_6.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/40402546624.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/shark_portable_steam_cleaner_sc505.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/affairscloud_current_affairs_october_2019.pdfIn PDF document text
    • http://tizosife.rf.gd/konurajerolinupexuzed.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/mazifi.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/baduzaxenip.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/english_to_japanese_software_translator_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/battle_for_stromgarde_horde_guide.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_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 5396 bytes
SHA-256: fc4cb058061882a5cf6db9e2eef1b495586f83e72e54bb3de5b8694943fcf5c7
font_01_sfnt_off00010118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 11720 bytes
SHA-256: ac2d9f293e1065974d2dc06902047e5b1e864d576fa0866a3de6498fef6b6ac3

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