Malicious PDF — malware analysis report

Static analysis result for SHA-256 525962e68ccf168b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-18 22:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dbb1533a777253a3556413887763f736 SHA-1: 1783362006ae9cffa478e38fc98520e8c597d645 SHA-256: 525962e68ccf168b72aad43614d701675af9e20e4e9e628ac638bf133fb5dfb3
146 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable hosting, and the document body attempts to mimic a search result for a common technical issue to entice users to click on a malicious link. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to redirect users to scam or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://bologen.ru/strik?utm_term=why+is+my+dyson+airwrap+not+turning+on PDF link annotation
    • https://cdn.sqhk.co/jopubelo/dfQfnyV/forex_trading_robot_for_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_604646e5ce9e7.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/hfUnJ93/apple_wallet_qr_code_scanner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_601095771f7d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ffdc7dc935b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_6021edc7b62bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451023/normal_604a0fb0ee8c8.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/43769994387.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/youtube_emmanuel_luces_de_bohemia_para_elisa.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/d4pHUja/zombie_catchers_hack_max_level.pdfIn PDF document text
    • http://instapodarok365.site/46693393494cz9bk.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/17431787357.pdfIn PDF document text
    • http://selectgetc.top/beat_saber_how_to_custom_songskefmw.pdfIn PDF document text
    • http://ecosbor.net/64067141685f3fz9.pdfIn PDF document text
    • http://ridunculus.com/tofavobisasikotanenono4wx5h.pdfIn PDF document text
    • http://waparudadip.mywebcommunity.org/reading_rules_in_english.pdfIn PDF document text
    • http://haifaiv.ru/merge_file_to_onlinee9i3p.pdfIn PDF document text
    • http://legendnat.space/pomiwagarakada2oqgm.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/a6Njape/amazed_lyrics_offspring.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/cjbXygd/meme_sound_effects_download_2020.pdfIn PDF document text
    • http://secureappeal.com/67305151127rybn6.pdfIn PDF document text
    • http://instapriz24.online/do_beats_go_on_sale_for_black_fridaybg3rb.pdfIn PDF document text
    • http://sexesex.site/64514290398sxwpk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d30daf8-bace-4507-8c65-5817f719ee71/vesivogavekewur.pdfIn PDF document text
    • http://xujided.onlinewebshop.net/the_things_they_carried_quotes_about_kiowas_death.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02cc5248-4bed-4641-8fae-4a6a295b978a/how_to_fix_my_keurig_not_brewing.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_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 5548 bytes
SHA-256: 715b098430909736b263723bab2b917579c56cb3417f63bb2be01a9bf93e6e03
font_01_sfnt_off000108db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DB 11340 bytes
SHA-256: 0a081e5777963cb88580b757f97eca34266c8c5ffab9f7efdcc9aff6e8b0254b