Malicious PDF — malware analysis report

Static analysis result for SHA-256 572912d587c227d0…

MALICIOUS

PDF

80.7 KB Created: 2021-02-11 07:31:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 4a1b41b96a1ab11d19b4b3b4c100ba33 SHA-1: c42c04a7da5fddc7586ef0d2a463527233dcc89a SHA-256: 572912d587c227d067debda30d7fb997a958a8beffcdfab24c647b3334a3d5f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are disguised as book downloads, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

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 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://druttle.ru/123?utm_term=eleanor+and+park+free+download PDF link annotation
    • http://xavelodezazil.iblogger.org/messenger_win_10.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/arceuus_runecrafting_guide.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/5732423.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/gidjc62/don_t_wanna_die_today_dax.pdfIn PDF document text
    • http://feziweninepiv.iblogger.org/wgu_math_readiness_assessment_answers.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/dac45c969462.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/fad1014fb90.pdfIn PDF document text
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/koxalo.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/dc6a82fe3.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/vibasujefir/activex_control_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/freddy_s_nightmares_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/zenikabelox.pdfIn PDF document text
    • http://wolodavufaxus.rf.gd/tavenekelofelun.pdfIn PDF document text
    • http://soxupagab.epizy.com/semed.pdfIn PDF document text
    • http://pekuvem.epizy.com/bukiropadutozamubosuto.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/antimicrobial_activity_of_honey.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/xbox_emulator_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/14525217859.pdfIn PDF document text
    • http://bokonejedebi.rf.gd/diagnosis_of_hepatitis_c_virus.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/tigesavololisotezewe.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_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 4632 bytes
SHA-256: 83bbb4f85b8ef12b151f0ece4d0e4e551c2714557c806723d5ebdb74583ff839
font_01_sfnt_off000100cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CD 11492 bytes
SHA-256: 40fa66ce63243e60a6766ae5e557ead4ae6571a07f11ee2bee1e8f4b0b536f88
font_02_sfnt_off000126ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126ED 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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