Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ff7ca8f7cf8300…

MALICIOUS

PDF

81.9 KB Created: 2021-02-21 12:22:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 52f262309af804c3aca4f1162ca3a953 SHA-1: e69c6f965985a8fd81d77ac7b6b8b7be2f397da7 SHA-256: 05ff7ca8f7cf83003500c22fd065e7de087832bd207e18b40a8ac3a724d820ca
196 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. It uses a password-protected-archive lure. 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 0.9998

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://crophysi.ru/wix?keyword=advanced+strength+and+applied+elasticity+pdf PDF link annotation
    • http://tixshopclub.space/piriformis_function_in_hip_flexionaa18v.pdfIn PDF document text
    • http://securityverifiedservices.com/psalm_91_esv_bible_gateway9zi55.pdfIn PDF document text
    • http://gouliwer.online/lineage_2_revolution_class_transferiax76.pdfIn PDF document text
    • https://tavovoxiwazufaj.weebly.com/uploads/1/3/5/3/135325502/risuti-wazukutuzeva.pdfIn PDF document text
    • https://letateworu.weebly.com/uploads/1/3/4/3/134365764/nakarewerolijem.pdfIn PDF document text
    • https://cdn.sqhk.co/dodalowogiv/nJhaXha/vadizunupisokuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/RhhdHQm/the_impossible_game_2_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/bO7hh73/classic_fm_radio_app_apk.pdfIn PDF document text
    • https://boloxekovo.weebly.com/uploads/1/3/2/6/132681585/8372544.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/qRiNgfr/haunted_tunnel_car_wash_lincoln_ne.pdfIn PDF document text
    • http://power-guard.shop/bjp_party_new_songnn3kr.pdfIn PDF document text
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/a1c312d.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/tapelu/grace_fit_guide_1-_8.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/hoedown_throwdown_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/canadian_international_school_singapore_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/52839511516.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/dawn_of_war_soulstorm_ultimate_apocalypse_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/pressure_conversions_chem_worksheet_13-_1_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/czardas_piano_accompaniment_sheet_music.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001166f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1166F 20840 bytes
SHA-256: 68bb7fcce46d7e1cde6b016707e6b085a2697f7a0b866fa5de2cd0ac79e1f791
font_00_sfnt_off0000e10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 5568 bytes
SHA-256: 7e8d8ee00af4459790127baa6fcc3d533028b176dbe412b243e9e00c3890e7f2
font_01_sfnt_off0000f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 9976 bytes
SHA-256: 031bef47120784209b71ee16d68423283eebaa4f9c33540b07e6e1021be91fa4

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