Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba5395f45cb232a…

MALICIOUS

PDF

87.7 KB Created: 2021-03-27 22:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 951945b0db9060fb541bebe03079abfe SHA-1: 59e4e543855037433e653f40cabc638cba754617 SHA-256: 2ba5395f45cb232af1b6bf2634753c7d3e43b6f1a9271d364579cbd954729eda
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 0.9989

Heuristics 5

  • 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 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://seumenha.ru/award?keyword=atmananda+krishna+menon+atma+darshan+pdf PDF link annotation
    • http://haustova.com/where_are_copeland_compressors_madelcel3.pdfIn PDF document text
    • https://pevunefimexog.weebly.com/uploads/1/3/1/0/131070247/zoberamubede_gumosuvefazawis_tigirokebes.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/jujovure_pinibodowo.pdfIn PDF document text
    • http://forkidsshop.online/fakasipul3453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444371/normal_5fc5a0eb02bbf.pdfIn PDF document text
    • https://tetomorefaboma.weebly.com/uploads/1/3/1/3/131384600/vexuvewariwipokobife.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/laboratory_guide_for_identification_of_plant_pathogenic_bacteria.pdfIn PDF document text
    • http://shoop-fm.ru/berkeley_review_mcat_download_freep01vo.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/how_to_silence_first_alert_smoke_and_carbon_monoxide_alarm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454055/normal_5fc8c3607b45f.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/53705729226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5fd959ec069aa.pdfIn PDF document text
    • https://posuzelivoj.weebly.com/uploads/1/3/4/8/134869480/mefiradoxakab_fivadoloroduj_xezun_lutazin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_6012f9d08e7f8.pdfIn PDF document text
    • http://nashremont.site/85689154108gg6e4.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/f11f8557-c884-409e-99ba-90e2c1250322/42464847167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/585f58fc-def8-4434-9283-e0aab33c60c3/dark_souls_3_review_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/spalding_48_basketball_system_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/net_core_2.1_tutorial_for_beginners.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/calendario_mundial_2020_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/project_cars_2_racing_games.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/tuvujatufobikedijexina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cfd974-e5a3-40a6-b973-cfe9ba570e77/sabacc_rules_edge_of_the_empire.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/konaponofoduxugadekuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/babilemixosapinax.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001028c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 5300 bytes
SHA-256: a4ee952cea2daa5a8853429a41c13af111557194b6ff60b67269c210bac267b7
font_01_sfnt_off00011467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 11336 bytes
SHA-256: f490b25e36f154de48db0ba1f927b80546c40ba99a9e2dfb6c45111be08c1aff
font_02_sfnt_off00013b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B01 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e