Malicious PDF — malware analysis report

Static analysis result for SHA-256 c888062f4b49b2cf…

MALICIOUS

PDF

90.7 KB Created: 2021-04-21 19:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 57c3b622331342a51fa7380f26f9a766 SHA-1: 9090a3bf20d983fe4b00bed5824b8110d0ddd44b SHA-256: c888062f4b49b2cfb6493f3c0d07606b7de17772a0c5b11fb5108e4b69b54aea
186 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. 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 0.9992

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
  • 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.
  • 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=taranis+qx7+mod+xjt+firmware PDF link annotation
    • http://gavixed.iblogger.org/71207428148.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/gjcjhhf/51782716255.pdfIn PDF document text
    • https://kagejiwuj.weebly.com/uploads/1/3/4/0/134095923/dabal.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/gejisedujujokerigako.pdfIn PDF document text
    • https://sufewusog.weebly.com/uploads/1/3/4/6/134644796/167aa3de36b.pdfIn PDF document text
    • http://bedojipekasel.22web.org/15845468580.pdfIn PDF document text
    • https://tovamegudisolos.weebly.com/uploads/1/3/1/4/131411857/837945268.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/5gcFTN8/80s_songs_list_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/hYgjgjO/best_kodi_build_firestick_september_2020.pdfIn PDF document text
    • http://zebarugusi.22web.org/52215364951.pdfIn PDF document text
    • https://tigafuxofezez.weebly.com/uploads/1/3/4/3/134363272/1d2d7d.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/jkZwLV1/5k_to_10k_training_plan_4_weeks.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/hc7IjgH/through_the_ages_card_tier_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/jihViex/52082814740.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/jcighcu/gacha_life_chibi_coloring_book.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/cdd412b2-2375-4422-9694-3c6528d385ce/best_online_spoken_english_classes_in_tamilnadu.pdfIn PDF document text
    • https://s3.amazonaws.com/ponivotigegepub/rt-n12d1_admin_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4f2a77-3440-4379-a229-30ede3e0da27/are_boss_audio_stereos_any_good.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/zoetropic_pro_apk_free_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/10902241202.pdfIn PDF document text
    • http://popadugabi.rf.gd/82148151955.pdfIn PDF document text
    • http://fufezexu.epizy.com/41166618034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef235b8a-5af3-4a69-8c2a-bc51e671f528/skyrim_how_to_get_mods_on_ps3.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_off000123c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C1 5412 bytes
SHA-256: 6b1f4952521623cd7e690e54e4d56862d3f86b27a8ae9ebcd06d93d9a5650ce0
font_01_sfnt_off00013632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13632 11572 bytes
SHA-256: 377ab8436cc005a7756ea6869d49d14fd0f6b09334d32a5ee2535fbeefa630f3

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