Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bb42945f7fbb61…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 09:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ec08fa5303911ba76ffe645a7e754675 SHA-1: 3ac106d74ee8e7dedb3648fa987d733ad9e4f994 SHA-256: d6bb42945f7fbb610e81357bf4cda4f131cdf6f5e01b4e07539dfa9d44407439
156 Risk Score

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 0.9993

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 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.
  • 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://jacksth.ru/award?keyword=urbanisasi+di+indonesia+pdf PDF link annotation
    • http://magic-world.site/was_blind_but_now_i_see_bible_verseffts3.pdfIn PDF document text
    • http://carbackseat.site/mares_puck_pro_o_cressi_leonardoiahcg.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/21441608074.pdfIn PDF document text
    • http://miiliioner.xyz/36432729866hau3v.pdfIn PDF document text
    • http://shop50off.info/865061371733tdyz.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/snapper_riding_mower_clutch_cable_replacement.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/tezofuretejom/aetna_medicare_provider_directory.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_5f21da77d9104d5fb2394ddcbc144344.pdf?index=trueIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_5c98bf14ae08436b8591fda7d8ce14ae.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_4664e9c94ca14c118d9e48e6558f9ec3.pdf?index=trueIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_ab64614bcb284164b6baf051882d11d7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/loan_amortization_table_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/snow_white_with_the_red_hair_season_2_episode_2_english_dub_facebook.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_236a47a7d2fc49509781ee19ed7e7b2d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/star_wars_kotor_2_character_creation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/lurufatomil.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/year_2_reading_time_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/adit_sopo_jarwo_cherrybelle.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/quadratic_equation_exercises_with_answers.pdfIn PDF document text
    • https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_4b80ad7242c747a6bfda4eaf707cb0f9.pdf?index=trueIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_0315e5cce30e4e5e8329994e2dba99ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/kefka_s_tower_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/umrah_guide_in_urdu_free_download.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_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 5132 bytes
SHA-256: 429fb07182d84138982552c025ef0ed87b6d9e4d467f51de521f22be7c4e7612
font_01_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 11060 bytes
SHA-256: 36dc05a661c4a5f82dc946d08fabf872e06d7a8b5b1d9b5e84f7204bd84c291e

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