Malicious PDF — malware analysis report

Static analysis result for SHA-256 8627d005a91577da…

MALICIOUS

PDF

68.8 KB Created: 2021-04-01 15:07:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3eb8fd1f9c6a60d6afab6ad487bcf657 SHA-1: 94ff7da6ebb74c0f0d6f9da2386a51e5c8e48d99 SHA-256: 8627d005a91577dacbe5e2c25f8e04a6da497c7e69bafac9da3f233144d89052
186 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 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/aws?utm_term=how+to+turn+on+ihome+speaker PDF link annotation
    • http://nopotaz.medianewsonline.com/31138721606.pdfIn PDF document text
    • https://fujamimoxelak.weebly.com/uploads/1/3/4/6/134601663/tonuzagili.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5fec73acb3ac9.pdfIn PDF document text
    • https://piwirajaluz.weebly.com/uploads/1/3/5/3/135312697/motorap.pdfIn PDF document text
    • https://ratofesut.weebly.com/uploads/1/3/5/3/135304008/kekozevebalufu_ligakanugume.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/8456316.pdfIn PDF document text
    • https://sukuwakutas.weebly.com/uploads/1/3/4/6/134603616/tigovil.pdfIn PDF document text
    • https://niwonuruvi.weebly.com/uploads/1/3/4/7/134767359/1769921.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497356/normal_5fcf24df6e062.pdfIn PDF document text
    • https://bitujidup.weebly.com/uploads/1/3/4/5/134598072/472306.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/33800677398.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/lorugipopuxe/6954298122.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/the_book_of_yeezus_a_bible_for_the_modern_day.pdfIn PDF document text
    • http://giworutiw.myartsonline.com/seller_support_associate_interview_questions_and_answers.pdfIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_6a928525e7364b3ea4ce8a94404fb483.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_949becd0310440c18ff26333ed6aeb9a.pdf?index=trueIn PDF document text
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_08c68398880d41198a58325efac40d2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/juzitadenatodijilixut.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/rusijulinokidaborasegowaz.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/vugepupinen.pdfIn PDF document text
    • https://ee67c5b3-b4d3-4257-b425-af55881d3a68.filesusr.com/ugd/c60da7_e75ffbe819c44a90bf2b35e6c8e21070.pdf?index=trueIn 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_off0000d183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD183 5144 bytes
SHA-256: 43447324df6212ac4dfe98e992eb9291b775d9c5fe8d1c460f7f04c15099946f
font_01_sfnt_off0000e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E3 10168 bytes
SHA-256: e2a83c78f0a0503b72e21b49d9801ee90f2d221913ae378fe6866e9053b14181

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