Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efc0e0a4b696932…

MALICIOUS

PDF

81.5 KB Created: 2021-02-12 05:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 689051d988cb5b4407b4f6bd7d437776 SHA-1: 59f5f83f5dd3ba385b554099831bdba1c605deaf SHA-256: 6efc0e0a4b696932f2158dbc38fe6d7fd46318df2ab0ae3082fc40c3ea6f9c5d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://baarspo.ru/123?utm_term=what+does+lgd+stand+for+dota+2 PDF link annotation
    • http://wirodapupoz.iblogger.org/chikku_bukku_railu_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378404/normal_5ff82941ad343.pdfIn PDF document text
    • https://cdn.sqhk.co/kufezagivori/hc2JJhh/ants_go_marching_one_by_one_original.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/gfbhjha/nosoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6020a8da0b824.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/hqjgK6e/digital_marketing_course_florida.pdfIn PDF document text
    • http://grinallex.shop/black_panther_full_hd_wallpaperdxjal.pdfIn PDF document text
    • https://cdn.sqhk.co/kiraxozi/8jjgihb/funny_tik_tok_videos_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/jirgjjf/lovely_pets_quincy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427103/normal_5ff6bdf87272c.pdfIn PDF document text
    • http://laura-egorova.ru/mighty_battles_not_workingcja6d.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/fhihd66/bepiletenaxupiki.pdfIn PDF document text
    • https://cdn.sqhk.co/tororukiwuri/jUUhgha/glitter_wallpaper_for_your_phone.pdfIn PDF document text
    • http://item-mask.top/ethernet_cable_crimping_guide88lpp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_60174fa25cbfb.pdfIn PDF document text
    • http://daimontimur.org/mountain_bike_shoes_men_s_spd6l638.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/lonozote/mcafee_data_loss_prevention_11_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/38995762385.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/bang_bang_movie_english_song.pdfIn PDF document text
    • http://kabitivawenavox.rf.gd/scheer_platform_on_immigration.pdfIn PDF document text
    • http://muropep.epizy.com/88898651373.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_off0000eece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECE 4544 bytes
SHA-256: f02995344eb38b65c39c37abacdbbfdd8e6ebf94a53f177e360e4a6fac4089fa
font_01_sfnt_off0000fec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC0 5312 bytes
SHA-256: b7d4a23caa24e645fcc51d50731d9a436a5762cc426e3034ec367aca759609d9
font_02_sfnt_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 11868 bytes
SHA-256: ed44deaf30cae289aada20047a7f9bc6e4501a56214d3b85f64214fb16c1a6f1

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