Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddf084368428284…

MALICIOUS

PDF

74.2 KB Created: 2020-12-19 08:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 63898de11d280f33272dd5b87e8e2e05 SHA-1: ef8bd4a59ad46106f4096f357f38217714a56bab SHA-256: bddf08436842828481e97219b407d4c5479ca44ae696db65e5166c7663969fe2
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://traffnew.ru/123?utm_term=formato+grafico+de+una+nota+periodistica PDF link annotation
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/xekidowi-fegodutumudil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_5fdb2d91a4093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fd0723f2030f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_5fbf2b1c10797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5fb50967e1942.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/segaro_mujos_mapixofaner_paribe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f92a78d7e752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc79565504bb4653ce62487/t/5fd6094d9264095525c9b1fc/1607862605424/chhap_tilak_sab_song.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf632df81c9a2a0c9a082b/1606378285245/bunker_alfa_code_today_2020_august.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58f3da87939686427c656/t/5fcbd39436758319a55db08b/1607193492460/wejefatalozejukilo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcec46b89e267495de7238a/t/5fd6d41a5488895576bd0898/1607914522536/biwuguvipavudafanazujerel.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9c6d242e893f6741e21c/t/5fdca41f6ba1be148e878c33/1608295456405/19501020254.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_off0000e454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE454 5396 bytes
SHA-256: ba3df047ec22a7877ae5e28b34329efd9e77a33991a14450c1b09935adb07c7e
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 11192 bytes
SHA-256: bc2282a0b95d50faebd84de8ac4e585b03c33ca770462c309c676af2029ec200

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