Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb3498ecd8189d4…

MALICIOUS

PDF

79.3 KB Created: 2021-03-31 02:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e59dcf5ed990494f89a44f3c8fcb8f1e SHA-1: 8f5cc46e4b4d68a5e389de7d0dff4d38624726e0 SHA-256: adb3498ecd8189d4bb31c89ff393dcf7debd9b02eee99a927aca73c773b7cfd1
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 0.9998

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://xajibur.ru/wix?keyword=6.4+c+periodic+table+of+elements+worksheet+answers PDF link annotation
    • http://helpverifybadges.com/google_sheets_vs_excel2wumh.pdfIn PDF document text
    • https://cdn.sqhk.co/wuzededoz/hijhbFG/13961718482.pdfIn PDF document text
    • http://doordash.fun/67786020889uakky.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/6gehdha/bellota_font_family.pdfIn PDF document text
    • http://donolemovune.mypressonline.com/33407660251.pdfIn PDF document text
    • https://zodekunomaxuj.weebly.com/uploads/1/3/0/7/130739112/beff551027a95b3.pdfIn PDF document text
    • http://mynasert.online/827785138927p2q3.pdfIn PDF document text
    • https://xijadusulotogu.weebly.com/uploads/1/3/6/0/136089771/987c94bb.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/fugiTih/walexifaniraf.pdfIn PDF document text
    • http://nazhivy.net/givebeterenizidatab37gmd.pdfIn PDF document text
    • https://wabelurotetef.weebly.com/uploads/1/3/4/6/134693048/83f6f4.pdfIn PDF document text
    • https://kasorewo.weebly.com/uploads/1/3/2/7/132740312/498617.pdfIn PDF document text
    • https://cdn.sqhk.co/pajiteka/iijCmmP/role_of_breather_in_transformer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vanatul/fakopidip.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/impulse_response_utility_manual.pdfIn PDF document text
    • https://fb5b3b17-6e6a-47c5-ae49-26eddba71e57.filesusr.com/ugd/aff7be_41f7ecfd5bce45b7abba58742d9572df.pdf?index=trueIn PDF document text
    • http://gezixus.myartsonline.com/samotonudexazevabumobi.pdfIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_9d765a1cbe264b14b266e85a4c468da3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/bang_bang_racing_game_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AB 5656 bytes
SHA-256: 8bab33afe8af5f4e5c7ea8049913c7517b93b8cabcd6ac1a51d95fb60dd32d7d
font_01_sfnt_off0000fabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABB 10904 bytes
SHA-256: 9ebb132654353c493e547f872928f18a85eda5e5e7767385af9d84fd2128f995
font_02_sfnt_off00011fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAB 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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