Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac53594db42f921…

MALICIOUS

PDF

86.6 KB Created: 2021-03-11 05:48:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: edd098f20f4a6b7060219b5274209347 SHA-1: ade9dcfefba5bee513d43d4c8a0c56d41cf973be SHA-256: aac53594db42f921730542c5ef76c8f723ca3e853c238188e13727b4b04a34d6
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 0.9996

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://bologen.ru/strik?utm_term=paulo+coelho+books+in+order+of+popularity PDF link annotation
    • http://boost-shop.xyz/como_hacer_un_bosquejo_biblico_ejemplosh8yqn.pdfIn PDF document text
    • http://ledekajigibinad.22web.org/bubble_shooter_game_for_windows_xp.pdfIn PDF document text
    • http://trysoda.pro/resumen_del_libro_en_nombre_de_la_rosa74xpw.pdfIn PDF document text
    • http://saudiautoinsurance.com/how_to_recharge_prime_video_on_app9n0s6.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/xafaxotaful/jonudetusaxar.pdfIn PDF document text
    • http://jukiwifid.rf.gd/bssc._bih._nic._in_answer_key_2018.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_aac1f2365815487d9c853b3dc21beb93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/51065550608.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_714a6f834b7d4eee9f3326f030ace91b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/que_es_el_bullying_libros.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_640daba8ed334aa6be99df67752459e8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/aeronautical_information_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/bogoriguzenuwig.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_b8c69774d6244b8cacc4c635c8ea386a.pdf?index=trueIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_e72162bb80624b0d8e158c09e0e11aa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wifukedot/how_much_starbucks_employees_get_paid.pdfIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_ca165dbacc6a4082bb2f0a1794eb1186.pdf?index=trueIn PDF document text
    • http://vowaxuf.rf.gd/cbs_sports_injury_report_nba.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_2463fb305cf04ff6bdd75b63c97d90cb.pdf?index=trueIn PDF document text
    • http://gitipezusev.rf.gd/battle_for_azeroth_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/free_photo_blemish_remover.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001079e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079E 5432 bytes
SHA-256: 73d97ee4f688546b376881c4043a826d928a58d59d298d55b9bae3f6b151736f
font_01_sfnt_off00011a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A00 10312 bytes
SHA-256: acd8aebe2a84b1fd0bddc5fccf04b7b17e6a7dc7ea4da43e39e3fad9524176a6
font_02_sfnt_off00013d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D49 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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