Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc2c2c94bc1ce39…

MALICIOUS

PDF

77.2 KB Created: 2021-03-15 03:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 87646103132ec392702e8c4457cfc32f SHA-1: 9a24c4e271170a0aaebbee1c216ed66315b2a8a4 SHA-256: adc2c2c94bc1ce39d140a6b9b8e3a9b862075177369d15236a56a0950648495e
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 0.9998

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 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://seumenha.ru/strik?utm_term=https+%252F%252Fwww.ramajudicial.gov.co+directorio PDF link annotation
    • http://gejesixave.scienceontheweb.net/does_simba_and_nala_have_a_baby.pdfIn PDF document text
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/f91f65d812.pdfIn PDF document text
    • https://zoxavemawoba.weebly.com/uploads/1/3/4/7/134728713/1351655.pdfIn PDF document text
    • https://zepifuvuxetota.weebly.com/uploads/1/3/6/0/136095774/pusujopazeju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovetijif/asco_clinical_practice_guidelines_prostate_cancer.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/53227535428.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd23a4d8-0f20-4250-b8f5-7878e7b76789/93093375367.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/geometric_shapes_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9764acbf-314d-4ce5-915b-073d13b82a44/pretty_little_liars_reboot_original_sin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8119c7d8-74ac-4830-95de-f9930fc284ac/cuanto_mide_1_8_de_pulgada_en_centimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/p_g_logical_reasoning_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/gopizafimadugep.pdfIn PDF document text
    • http://dufobirufo.atwebpages.com/78663092177.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/35434573355.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/biblical_names_and_their_meanings.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/76845889237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e90cdf0-57f6-42b1-9921-dbcade9ef1b9/will_there_be_another_the_mortal_instruments_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/apset_computer_science_previous_papers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/update_android_studio_jdk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 5652 bytes
SHA-256: 1102d975316cfafab1cf2b0df17bcf872fe099dfc22911b69f2072307ee524bb
font_01_sfnt_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 10296 bytes
SHA-256: 70994f17e893a9f18ef5ab8af383265c3ed003e757bb3d981e8b2801bdade292