Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8e194f7ead025f…

MALICIOUS

PDF

73.9 KB Created: 2021-01-31 03:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28d753af0cc21275c7a1e2b3335bf092 SHA-1: 5964bb5674a6ad379828ecf045afe3012c260a47 SHA-256: 4e8e194f7ead025fdbdd43fc88994ff6184eb43960ef5232b87e2702183bc8bd
204 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. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/aws?utm_term=winrar+5.+71+crackeado PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369316/normal_60066b86c185c.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/0ed2642bc7b66.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/bToVmnD/train_taxi_juego_online.pdfIn PDF document text
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/46831.pdfIn PDF document text
    • https://ligibumifi.weebly.com/uploads/1/3/4/6/134647936/82109dc334c41d.pdfIn PDF document text
    • https://gotizede.weebly.com/uploads/1/3/2/6/132695714/8970187.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/2wdgfgh/xevejugavonuwupid.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/0jgclcp/7260273727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460723/normal_601236b6157cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457839/normal_60036296dbd1d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5fe0879ac0f8e.pdfIn PDF document text
    • https://vimudizod.weebly.com/uploads/1/3/4/6/134632239/3242750.pdfIn PDF document text
    • https://pidofuvu.weebly.com/uploads/1/3/0/7/130739764/vesipawovidadis.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/hdojihf/hakuoki_kyoto_winds_sanan_walkthrough.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/tavazisatanix_fowudi.pdfIn PDF document text
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/medazusidake.pdfIn PDF document text
    • https://cdn.sqhk.co/xeliwiwogivo/djhihjh/52993760794.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/mejigavukolu/bengali_song_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/filing_false_police_report_charges.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/40613784181.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/buniwemopijezeso.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/lotupa.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_off0000e4a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A0 5088 bytes
SHA-256: c0777635047943073940bcd689329c25956449d86e564e943e4f82b312b83dbc
font_01_sfnt_off0000f628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 10716 bytes
SHA-256: da8ef25fda485494621d2f6c9b743c85dec9be16fd08426b6619a08e259e2e95

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