Malicious PDF — malware analysis report

Static analysis result for SHA-256 e605e8f0f1d3812a…

MALICIOUS

PDF

83.0 KB Created: 2021-02-04 12:19:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0ed51c5d1a5f05aee6ac2f4c6ea089b4 SHA-1: 478cfe8d3ee964ba25311e0f05d1f1d3ac2dda4f SHA-256: e605e8f0f1d3812a003a62a81e138c2a0d3a5cc85564d217e0720a7b154f5a6a
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, including a link farm, suggests the document is designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to PDF generation and potentially embedded URLs, further supporting the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wb?keyword=best%20gameboy%20colour%20emulator%20android PDF link annotation
    • https://cdn.sqhk.co/womalakifaxa/bjiEaia/overkill_definition_biology.pdfIn PDF document text
    • http://teaapple.space/volume_of_rectangular_prism_worksheet_kutap01c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423136/normal_5fde83781c204.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/gaxiniwetikiwo.pdfIn PDF document text
    • https://zapojejomelaxi.weebly.com/uploads/1/3/0/7/130775516/d8c664.pdfIn PDF document text
    • https://punafatig.weebly.com/uploads/1/3/1/4/131408139/goxin.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/2060189.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457620/normal_6014a11dd0eff.pdfIn PDF document text
    • https://kazusabetife.weebly.com/uploads/1/3/5/3/135318045/medozasowefibikogafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_5fe8566a4c91a.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/gciiHge/65468105816.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/dPBWwbL/red_ball_3_volume_4.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/GxhbRih/little_warsaw_restaurant.pdfIn PDF document text
    • https://taxubixud.weebly.com/uploads/1/3/4/7/134760406/6fbf40ef8b8dfe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408478/normal_5fcdad2491f41.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/dozore/noribalavug.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/52136452677.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/distressed_debt_analysis_customizable_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/lara_croft_android_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/sony_ericsson_walkman_bluetooth_headset_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5432 bytes
SHA-256: b786ddd8a8ba0c39529c61ff930fd43fd7a87f0ada304638bd97b9ac7204df6f
font_01_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00010b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B52 10720 bytes
SHA-256: 26b12132920bb3479006719a2fc74264a3dc2f785bc50053776bb6a40439a8ba
font_03_sfnt_off00012fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD2 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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