Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65e11a118ef6365…

MALICIOUS

PDF

77.9 KB Created: 2021-03-20 08:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e331eac78db21e64043f6e89eeb104d3 SHA-1: 1fc4dfbe9534ac0fd773e2f60a501eda6927e3bd SHA-256: f65e11a118ef636566d74d6153ca5033833ae5faab0741ab1a9730edbb634b59
166 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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.
  • 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://midufefew.ru/strik?utm_term=denon+avr+3312ci+factory+reset PDF link annotation
    • http://kenugizi.getenjoyment.net/south_carolina_dmv_permit_test_practice.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_601675dc281da.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/ajfsMje/the_notorious_jumping_frog_of_calaveras_county_questions.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469638/normal_60091f6f1bfa6.pdfIn PDF document text
    • http://idealica-official.website/memusisisitojuvatew0kgxw.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/tgiNjaw/bubble_tea_boba_near_me.pdfIn PDF document text
    • http://keto-s1.com/why_wont_my_treadmill_turn_onslgy7.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/garmin_vivofit_4_battery_price.pdfIn PDF document text
    • https://cdn.sqhk.co/getabemuto/Ngchagj/merchant_marine_academy_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444647/normal_6033c4971b079.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/mini_dv_cassette_converter_to_dvd.pdfIn PDF document text
    • https://cdn.sqhk.co/peporewav/0uCXXrQ/best_zombie_shooter_games_xbox_one.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://menenig.rf.gd/ansys_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc9d5c3-1777-4653-9006-30c22e32c601/what_accessories_do_i_need_for_my_big_green_egg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d553a890-291a-49c9-acd1-d749e8bd4f68/how_to_share_blog_post_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc462d9-d62c-4da4-9847-a9aa86b2aeda/kenmore_microwave_over_the_range_home_depot.pdfIn PDF document text
    • http://pivirujifija.epizy.com/pukusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/276882e7-27f0-4023-bd55-aae1a6e98ab4/95045436426.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/el_camino_del_artista_online.pdfIn PDF document text
    • http://vuxikujare.epizy.com/stephen_king_books_in_order_of_publish_date.pdfIn PDF document text
    • http://filuteka.rf.gd/guidelines_to_social_considerations_in_curriculum_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE510 5140 bytes
SHA-256: decb6119e3a2f619797897ca5148e228b425d34f2416b1b58f0f16be9a00bec6
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 10788 bytes
SHA-256: 5e71ebeea5eaf538ea757852007b1d3f69abecc7d88f3ad3b645407329c74def
font_02_sfnt_off00011b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176