Malicious PDF — malware analysis report

Static analysis result for SHA-256 47575f728bd7d88a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-30 14:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cb310d05a7f538e0e697b06b9d46d69e SHA-1: 2faa7dd0487a729f0cee390c75e5430543c30551 SHA-256: 47575f728bd7d88a07719a37e421e516e2be7f5b0051e349d9dbd4b3c55ddde3
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 0.9997

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://bologen.ru/aws?utm_term=what+is+the+name+of+the+game+where+you+have+to+guess+the+word PDF link annotation
    • http://xojudesabesone.66ghz.com/ep_commodities_annual_report_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/pgjHhg0/zebamazerokubufowolidomor.pdfIn PDF document text
    • http://clubstore.info/which_beard_trimmer_is_bestee3oa.pdfIn PDF document text
    • https://cdn.sqhk.co/vopofuxo/hiciarV/freeciv_android_download.pdfIn PDF document text
    • http://dreabling.online/magic_tree_house_haunted_castle_on_hallows_eve7b81e.pdfIn PDF document text
    • http://bonboxstudio.com/why_is_verbal_communication_important_in_businessndulx.pdfIn PDF document text
    • https://cdn.sqhk.co/lowimipofevu/U4hjid3/56294990218.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/jjia2hg/download_sms_ringtone_iphone_8.pdfIn PDF document text
    • http://choosenews.space/www.bpsc.gov.bd_admit_card_40th_bcspjili9.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/hdVzhcJ/highway_bike_rider_3d_racing_racing.pdfIn PDF document text
    • http://shopyou.online/dell_precision_m4600_memory_configurationmrohx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_d0f437d2bc854a70b46d2fbd42ef56de.pdf?index=trueIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_b392c283afd5418bb9602fd7c8cb4803.pdf?index=trueIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_9b46dd6c477c41ec80d6f0b9ba314ab6.pdf?index=trueIn PDF document text
    • http://jesuwipefeg.rf.gd/facts_and_figures_book_answer_key.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_f7f974544fee47769e80194cb0c1afcc.pdf?index=trueIn PDF document text
    • http://veruzixiki.rf.gd/queen_bed_sheet_sets_100_cotton.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_69bda80e6d7446bbade71f16466ca084.pdf?index=trueIn PDF document text
    • http://nodegopoxomo.epizy.com/aisi_4130_material_specification.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_6dd0b10a829749859b08b5b810bc6d95.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_cd3cb3a7245a4692b639e8a1f9329351.pdf?index=trueIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_459c6d26ca2446ada4e4dac9c19d1514.pdf?index=trueIn 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_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 5556 bytes
SHA-256: a6cc1c63f7a2f91d15b24b9fe69a19f07a958cb6a39a0bd57a1e06ce000f5fc9
font_01_sfnt_off00010f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F05 11232 bytes
SHA-256: b907cfb179017bb052f3588b8a9aee25a148de37f93d27bfdbd6db6f4ee5f6d3

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