Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed20d3ce815afd41…

MALICIOUS

PDF

76.3 KB Created: 2020-11-12 20:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7c77966a89af44842a84acdf076b16b0 SHA-1: d0b96da8a64a5a766cd09c7e0db2014aab726912 SHA-256: ed20d3ce815afd41f2f7c3e8088ef5733771b09adfdeedda82d37fb9c88270de
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://trafftec.ru/strik?utm_term=doterra+vetiver+diffuser+blend PDF link annotation
    • https://kunulidozejenu.weebly.com/uploads/1/3/3/9/133997834/dibukob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460255/normal_5fa87882cdb5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f875fae67bd1.pdfIn PDF document text
    • https://marejeloxivel.weebly.com/uploads/1/3/4/7/134709382/5858768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412773/normal_5f99bd99439c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fac46b41ae0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_5fa1e3f2534ac.pdfIn PDF document text
    • https://sotufipepu.weebly.com/uploads/1/3/4/5/134595957/994221.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://uploads.strikinglycdn.com/files/93dd1fc2-de91-4249-803a-675e85854d9d/cinema_hd_v2_apk_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a644683-85bb-4d7c-a276-ed318cb2a540/3880150438.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/jefferson_parish_clerk_of_court_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/standard_overhead_cost_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/rehearsal_dinner_speech_groom.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/nafozuji.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/75024286040.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/marble_institute_of_america_cleaning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 4980 bytes
SHA-256: ecb9676fc74576d35ba3e79c6a470ab4b8058a9db84f0006f891c8f2b33c72a9
font_01_sfnt_off0000f053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF053 10928 bytes
SHA-256: 52447526706e4c9fba170a9a05ee91af0f07ab43f3239672aa9124d747b9e178
font_02_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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