Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b16bc4eb472e6c7…

MALICIOUS

PDF

86.6 KB Created: 2021-05-05 19:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9e8f491860414ced891ff581535e636a SHA-1: 5add272841980289fa0d19c88944a1cb37cf4cdc SHA-256: 9b16bc4eb472e6c7b40a9c7e650f2ffe7ffd14828e11c311ba1c72ca8c6b36db
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 0.9995

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=a+clash+of+kings+chapter+11 PDF link annotation
    • https://zofenegug.weebly.com/uploads/1/3/1/6/131636866/f90d5c1.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/affordable_care_act_application.pdfIn PDF document text
    • http://konosabidirawu.22web.org/astrophil_and_stella_poem.pdfIn PDF document text
    • https://vijamosikafej.weebly.com/uploads/1/3/4/7/134772382/6602028.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/5203031.pdfIn PDF document text
    • http://wopafopu.22web.org/esl_bathroom_vocabulary_worksheets.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
    • http://fipuzugajan.epizy.com/ryobi_18v_airstrike_brad_nailer_review.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/attorney_reference_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/dexatolunuxiraluv.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/goleto.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/5044348999.pdfIn PDF document text
    • http://temolujipu.myartsonline.com/los_cakchiqueles_en_la_conquista_de_guatemala.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_to_factory_reset_iphone_5_without_itunes_forgot_passcode.pdfIn PDF document text
    • http://nepopenezum.rf.gd/casio_twin_sensor_3157_sgw-100.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/roberogonejafejarurixepin.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/kitchen_aid_superba_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/android_objectanimator_example_tutorial.pdfIn PDF document text
    • http://tifiwaw.rf.gd/67994852166.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/abrahaminte_santhathikal_malayalam_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/caras_mexico_vicente_fernandez.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/davikabokimarurus.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/jipuzovonukulekudol.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_off00010711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10711 5168 bytes
SHA-256: 18c8cbc9310dbbf7188d8ca9a00538ba33b5dacd5238359de613ce5be77cb9b4
font_01_sfnt_off0001189a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189A 11272 bytes
SHA-256: 3c899bfa87aa64f0ac70f945b0ebe515b2f8d37cd32d960814955ffd4149a9d1
font_02_sfnt_off00013ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.