Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea29456dc64cc87…

MALICIOUS

PDF

77.6 KB Created: 2021-01-08 14:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8655fbb0975ac3a243fb6a4c9a0797e5 SHA-1: 9ee83b032ef29301f9f387e89350d93dedb3dbc2 SHA-256: bea29456dc64cc8785fa4eb6b965ddcb6c8707f6ba1a7c36faef6a1f5922efbf
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm, and a heuristic for a visual download button. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://traffine.ru/123?utm_term=app+sara+apk+descargar PDF link annotation
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/d5b052d0.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/595f5392db.pdfIn PDF document text
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/3320981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5fe21b5f41a8d.pdfIn PDF document text
    • https://fojeketilow.weebly.com/uploads/1/3/1/3/131379262/960194.pdfIn PDF document text
    • https://viwifigejemi.weebly.com/uploads/1/3/0/8/130814408/8202804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_5fb54e5f40fbf.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/xetasif/windows_10_pro_product_key_free.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/547629874.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/kelukigozu.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/bupodizutapisasakovi.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/bahubali_2_movie_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/watch_joker_online_free_english_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/54122547316.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 5264 bytes
SHA-256: 4acaa4d2e0024a36858438e5a4d526810dd2a36d7e38108e4418cd72885b015a
font_01_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 11096 bytes
SHA-256: 16bad2cad0f7110341ce62ebffe3af1c5ac742d9e5d5f005ab7a2b3079ae9e38
font_02_sfnt_off000114ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BA 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848

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