Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dee6184c4f6ac5…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 04:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 82e2851af29af04fa6137ac766048fd3 SHA-1: ce5f96712134933df23e79d6b94b619b6f6abb6f SHA-256: b5dee6184c4f6ac563e59cf8e9d0e95c34a7df062e975f304ba3e025c9a0592c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9991

Heuristics 5

  • 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.
  • 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://golowaki.ru/wix?keyword=bully+scholarship+edition+english+4+answers PDF link annotation
    • https://cdn.sqhk.co/buvaboda/geiijgG/invisible_ios_home_screen_icons.pdfIn PDF document text
    • http://libopadu.scienceontheweb.net/boutique_hotel_design.pdfIn PDF document text
    • https://nokuzase.weebly.com/uploads/1/3/4/7/134765685/755329.pdfIn PDF document text
    • http://tasiperop.medianewsonline.com/18954756124.pdfIn PDF document text
    • http://moxegelubopidi.sportsontheweb.net/somewhere_over_the_rainbow_ukulele_chords_glee.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/8637417.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/97742471998.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/3Bfvvgg/photo_editor_pro_cartoon_effect_collage_maker_apk.pdfIn PDF document text
    • http://fomigiv.mypressonline.com/first_aid_for_snake_bite.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/gepibuguno.pdfIn PDF document text
    • https://rodekovolopipek.weebly.com/uploads/1/3/4/3/134372516/be7a7fc764.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/7982189.pdfIn PDF document text
    • http://tamakedesununod.mywebcommunity.org/star_wars_knights_of_the_old_republic_pc_download_free_full_game.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/jamjiA3/37895624022.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/gejit.pdfIn PDF document text
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/ae6ba.pdfIn PDF document text
    • https://cdn.sqhk.co/vovawumusa/frjiPjg/pk_xd_mod_hack_apk.pdfIn PDF document text
    • https://riwipawubo.weebly.com/uploads/1/3/1/4/131453561/e389fe9065db.pdfIn PDF document text
    • https://rulipativix.weebly.com/uploads/1/3/1/6/131607363/9696518.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kejarajavamoge.epizy.com/20431822941.pdfIn PDF document text
    • http://wifotuzo.rf.gd/pepatowasezanu.pdfIn PDF document text
    • http://bebovufuvuji.myartsonline.com/what_is_a_research_instrument_definition.pdfIn PDF document text
    • http://redifigikutusoj.myartsonline.com/29901956910.pdfIn PDF document text
    • http://pekomuvave.myartsonline.com/why_wont_my_chevy_equinox_start.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_off0000ec57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC57 5668 bytes
SHA-256: 6a5af810374f1bd0d6029cc25d1f8fe36f1f10685b36d82fc4ba25fe4840ad77
font_01_sfnt_off0000ffc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC3 10620 bytes
SHA-256: e77a4383195a8d44c9fe78defeed4fa4dc0ca8a64bdb461f6eaa50ee8fee324b

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