Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3b5934bdc524cbe…

MALICIOUS

PDF

78.2 KB Created: 2020-12-06 22:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7b6a0392d0425312ab87c688e0367a13 SHA-1: 9b7eb760743d17f6cb1cc0a887e01111e84d1fe2 SHA-256: a3b5934bdc524cbea05b71892e8950a4ddae4081bbb7b8b34da26d8e93a8cf75
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 0.9996

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://traffine.ru/123?utm_term=lava+dragon+osrs+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fcaef21deb2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5f9a8b5d38a15.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/zomedan.pdfIn PDF document text
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/puwix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf48d3f81c9a2a0c98124f/1606371540262/11097433803.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/catalyst_9500_hardware_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e9c47d0c8f249d5a9be7/t/5fcc31b89aa2de0c648500f6/1607217592938/carolina_reaper_pepper_scoville_rating.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/apache_maven_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/ethical_principles_in_qualitative_research.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d9cdc14dfd36fe0adb20/t/5fc89926d17d55300fb201fa/1606981926968/zombie_room_escape_game_2020_puzzle_game.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e38f8c9e503d27a65431/t/5fc986ea8562787517517f33/1607042796897/rabomafopinefofofimud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc79499c2869f0c81c408f5/t/5fcd0e0a9aa2de0c64982e0f/1607273997062/72397399352.pdfIn PDF document text
    • https://s3.amazonaws.com/movodanex/watch_saaho_full_movie_online_free.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FB 4764 bytes
SHA-256: 223794904055e963c5674ea1514c00e961c75184fc3c55bcb3efc6121e64338d
font_01_sfnt_off0000da2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2E 11052 bytes
SHA-256: e556b7109c861d1c7cc12dec22e4724104f14bd8259e5a1e60c62ce4e1ed7c44
font_02_sfnt_off0000f9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BA 10516 bytes
SHA-256: 1ebf336d78f6cbd43d49e9d9b758cc7ec7ad97b10bf8ca21b1b0257630103d58
font_03_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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