Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9beaaddb17af79…

MALICIOUS

PDF

76.1 KB Created: 2021-04-03 04:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 63b0bb68afe8964765127e694e18bc20 SHA-1: 95823e2fac736d72b77e71342618683630f24b3d SHA-256: 4f9beaaddb17af792aed00798372ef25d3bc49dcb69a72f40562cf352e73a8e5
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 0.9991

Heuristics 5

  • 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.
  • 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/wix?keyword=norman+north+high+school+library PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415543/normal_60010375ef5b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_600ee71fecafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370264/normal_6049305e66f38.pdfIn PDF document text
    • https://peziwavadeba.weebly.com/uploads/1/3/4/3/134313506/gewolilumo-nekotop.pdfIn PDF document text
    • https://wokukowuvewa.weebly.com/uploads/1/3/4/3/134316041/2bdb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_6016c56ce7395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459162/normal_5fd0f0638e58c.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/fdbe59614c53c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379973/normal_5fe4d23b2f0d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_601c025eba9fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376362/normal_5fc6dba9dcc03.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/lizapikagow-vomufeladam.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/kifutizijebuj/game_tester_interview_questions_and_answers.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_e15a3943c359481b8af78f3da65fee0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jagux/zovovoripiwivogeri.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/81231879579.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/24820322749.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_b54ea9966ab24557a38fcea7cf9be27d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/how_to_write_an_essay_conclusion_scribbr.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/burger_king_gutscheine_2019_august.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/foxtel_tv_guide_perth_wa.pdfIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_d57e5a59fb9242ec9eeb67fc430babb1.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_e1b1e0a922a44236b90168b303491aed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/papovifikonejo.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_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 5424 bytes
SHA-256: 215e6f9b60a8ff6cfb8b89eb9c0da8c6301c0af84d26bdeceeea6c5ee5ae161d
font_01_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 10396 bytes
SHA-256: 468df743a11145000a1005de70355ab3a05be288318403411660fd32985517a8

Open this report in the interactive analyzer, or submit your own file for analysis.