Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c95ff4e042bd88…

MALICIOUS

PDF

79.9 KB Created: 2021-03-05 03:21:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 46895efbfb8e13bb4292eeea26b58111 SHA-1: a2eefceea7bffc250e4b7b1db0666b2582c3e20b SHA-256: 37c95ff4e042bd88a8a5e74b789db43bc22e0398538f5b2263c59f89b8900cc2
154 Risk Score

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it's a link farm on disposable hosting, potentially luring users with urgency or callback phishing pretexts. Although no scripts were extracted, the presence of numerous URLs suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=how+can+i+renew+my+cpr+card PDF link annotation
    • http://megantv.site/does_the_ab_lounge_workypob2.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/how_to_write_a_statement_of_faith_example_baptist.pdfIn PDF document text
    • http://daating19.site/block_strike_pc_20207ugkc.pdfIn PDF document text
    • https://cdn.sqhk.co/daviluzabidi/Fgdgijg/1015738278.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/hp_6700_printhead_missing_failed_or_incompatible.pdfIn PDF document text
    • http://forezofulafenu.iblogger.org/47171509901.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/Fidjcgc/carrom_disc_pool_game_download_mod_apk.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/ms_project_2013_32_bit_free_download_full_version.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/marshall_valvestate_2000_avt_150_half_stack.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/Tggbvjh/gigigilokazobafem.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/igj83jb/king_s_raid_plugin.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/the_merry_adventures_of_robin_hood_chapter_4_summary.pdfIn PDF document text
    • https://cdn.sqhk.co/jezofadu/icihNih/super_cat_tales_2_world_2_secret_level.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/gdohg3C/hatsune_miku_offline_music_video.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/mZzhamR/92973757513.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/geheRhh/febivudup.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/hjijbgg/roadside_attractions_ohio_map.pdfIn PDF document text
    • http://giocodigital.space/sevukenu62c.pdfIn PDF document text
    • http://migajipanijezep.22web.org/metabolismo_de_proteinas_y_aminoacidos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/sufapiboro.pdfIn PDF document text
    • http://kafagida.rf.gd/gikelunenikinogelenulip.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/degowaxovujawesep.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/53033176340.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/57212420007.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/zipozi.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 5164 bytes
SHA-256: a636fe5b9f7b9b07aded83d149d0d7a53215b8c44ede6d0da866d9b2d25c73e9
font_01_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off000108fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FD 11720 bytes
SHA-256: 4250a2cb16aeb28e47ce807e3beb94c85ea780dce7332dfede222af6ac3fe2e6

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