Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dd006dab2b1965…

MALICIOUS

PDF

77.7 KB Created: 2021-04-08 21:49:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cc2a1680495103344e6a9d873dcffc94 SHA-1: 7c2ff884bfa7e72d3ccad7d293ce2152ca5b3f34 SHA-256: a6dd006dab2b1965759d932e5602d91058347cca069c6fc77dbc648c30d57d20
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the presence of multiple suspicious URLs points towards the document's primary function being to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://gimoguvi.ru/strik?utm_term=how+to+use+xbox+360+turtle+beach+headset+on+pc PDF link annotation
    • http://afracheat2.xyz/7601072874925rkn.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/jjb9E4S/bass_music_player_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/cNagdK4/swatch_group_brands.pdfIn PDF document text
    • https://cdn.sqhk.co/migiwepi/XjajgYX/rare_blood_group_hh.pdfIn PDF document text
    • http://gatorama.fun/news_reports_on_anti_social_behavioura2dtn.pdfIn PDF document text
    • http://sesalon.xyz/evinrude_e-tec_150_price0qmn8.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/a71hajh/lazazatefag.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/ii97kja/destiny_2_dreaming_city_quest_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zamikukodef/vnxZieq/77470453258.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/Niiicgf/25516863326.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/shegjgg/adidas_nmd_r1_v2_star_wars_lando_calrissian.pdfIn PDF document text
    • http://bulibujirifubof.scienceontheweb.net/soverolafumom.pdfIn PDF document text
    • https://cdn.sqhk.co/supetudoti/B1tjfjh/baal_veer_2_2019.pdfIn PDF document text
    • http://topmassage.net/59419033618hjspl.pdfIn PDF document text
    • http://axecheat8.xyz/nopogisapeso750ae.pdfIn PDF document text
    • http://biomanix.best/60771987706tcfz6.pdfIn PDF document text
    • http://amsidisi.xyz/how_to_compute_posterior_probability3ve4y.pdfIn PDF document text
    • http://islemleriniz.org/dd_5.0_players_handbook_downloadxnrrd.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/hhTYLKL/insert_square_meter_symbol_word.pdfIn PDF document text
    • http://distornyup.site/10776699457mq6o.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/wulagisi/teachers_day_song_in_tamil_audio.pdfIn PDF document text
    • http://liroporuki.myartsonline.com/60049376249.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/europa_baby_palisades_crib_conversion_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/41581395013.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/tewetazal.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/zajip.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_off0000f062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF062 5884 bytes
SHA-256: 2e48fcafe01148dbe1361c7110d6d13acef92fc8b222a6109484977047c8dfcc
font_01_sfnt_off00010461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10461 10696 bytes
SHA-256: 8f9ed61c69f768859762fbfb2b21ab9109cd902c95d7a6acf4f2fabc09580929

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