Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2adb4c8059d816b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-08 23:14:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 95aa4c4b299e1dbad1817c64f87db85d SHA-1: 5d584d9980a4ef2f978d76b22c167ede264c0530 SHA-256: f2adb4c8059d816b9a478e6fb15a82e4990a90265bf944206b4be364f8bfdd93
176 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 callback-phone (TOAD) lure. 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-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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xezojetit.ru/123?utm_term=account+executive+resume+format+doc PDF link annotation
    • https://sevimuxeso.weebly.com/uploads/1/3/0/7/130739978/kifawul.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/miwutinipizeve_nusifab.pdfIn PDF document text
    • https://surugatolezijef.weebly.com/uploads/1/3/4/6/134631687/gobejazegelove-gefuburus-xoxatag.pdfIn PDF document text
    • https://ritixiduj.weebly.com/uploads/1/3/5/3/135308555/mujejute.pdfIn PDF document text
    • https://xezitolisaja.weebly.com/uploads/1/3/1/4/131406502/rosifofezi.pdfIn PDF document text
    • https://mesakarune.weebly.com/uploads/1/3/1/3/131380767/tinusukokobu.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/04ffce.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/jymjfjc/35827980690.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/fXiicjh/sci_fi_girl_wallpaper_4k.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/sifawekujiki/fire_drill_template_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dee261b-5782-4486-a809-05f7352653af/sibor.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/forest_rally_spectator_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/duckduckgo_vpn_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/musajonip.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/vojubogotusi.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/dell_latitude_5590_i7_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/best_wall_mount_for_hisense_40_inch_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/96714438723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ba2a278-6abe-4ef9-90a7-839188cf7463/zapituwirunuwefojekoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bda2b09-9e76-447e-810a-f0b5eb928ee7/three_stages_of_creative_development.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_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 5252 bytes
SHA-256: 7ff7fd42bcb798941b2d4a7a6da0ed2ad7e799a84449e48496719c8e40aba765
font_01_sfnt_off0000f91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91C 11760 bytes
SHA-256: f15157d1b062e4482906fda21c9866cbf4f03ee81c72cbacd301d5e04bd45afb

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