Malicious PDF — malware analysis report

Static analysis result for SHA-256 97df856b2c478707…

MALICIOUS

PDF

140.6 KB Created: 2021-05-19 16:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a98ae1f7af1a82b13139a8e8e2cbaf61 SHA-1: 0081917efadda9768afb049490339173cc308ffa SHA-256: 97df856b2c4787075d44d8ad1ff89b3f65bf4244498eb6441ed59e40e9245f8a
216 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many of which are generated SEO-style links, suggesting a link farm or phishing attempt. The primary external URI points to a URL that appears to be a lure for downloading software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://druttle.ru/strik?utm_term=cisco+anyconnect+secure+mobility+client+linux+mint PDF link annotation
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/79d593d.pdfIn PDF document text
    • https://lefafikof.weebly.com/uploads/1/3/0/9/130969708/dodez.pdfIn PDF document text
    • https://debegibur.weebly.com/uploads/1/3/4/3/134308456/ralotix-wotegop-tatusojefigaven-nisebum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503987/normal_60591f15d239c.pdfIn PDF document text
    • https://wofogubegir.weebly.com/uploads/1/3/4/7/134728038/wepanis_xuxukefogesoxo.pdfIn PDF document text
    • https://ponigeje.weebly.com/uploads/1/3/0/8/130874529/rajurej_dutuletidifakiz_kolijakinedevuk_bozilugerugivot.pdfIn PDF document text
    • https://sizugive.weebly.com/uploads/1/3/5/9/135993047/ec3bcf48.pdfIn PDF document text
    • https://xazovobarobek.weebly.com/uploads/1/3/4/4/134403102/dugebubi-kixezar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455195/normal_5fcd84f3b552a.pdfIn PDF document text
    • https://bojuzogonugux.weebly.com/uploads/1/3/5/3/135304036/balima-firufode-niduno.pdfIn PDF document text
    • https://wisufisuzok.weebly.com/uploads/1/3/1/3/131383924/3d42aee511d.pdfIn PDF document text
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/jofonutidi_ralebatikafete_lujonumulirifeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374175/normal_6058e84acf781.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/zidosozawok/java_swing_toggle_button_selected_color.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/do_you_have_to_make_a_speech_at_graduation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/672ae404-1e5d-4c2f-bc90-4b792ea29cfa/40827680618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d5aace-9af7-427b-84c1-bc29e9154f90/bibidirejimoxokibuvaxowi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/alita_battle_angel_full_movie_2018_hindi_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/zafeselug.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/email_google_sheet_format.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_off0001e8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8D8 5160 bytes
SHA-256: 6ea5aacda1b4c06e6590d7e749f6764be28760fcc5aa2c080753d524907a8b40
font_01_sfnt_off0001fa59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA59 12308 bytes
SHA-256: 096bb5145b15f6f1b5f7a0f91a3319ce24dc32c5a4bd7323a9f95f5bdcdd7b55

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