Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f9798b35917ec0…

MALICIOUS

PDF

76.6 KB Created: 2020-12-01 04:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9e475252531d97fbbe009421c248ce42 SHA-1: 5c113e3df4727fa373ee5187573eb67ef65a3ad9 SHA-256: 33f9798b35917ec0b3ac581704bd6424cd6d9fc9dbc021441eb46897b3421eaf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://traffine.ru/123?utm_term=ballad+of+gay+tony PDF link annotation
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/tojipefiliwizuniped.pdfIn PDF document text
    • https://sagerogokijisoj.weebly.com/uploads/1/3/4/6/134601402/vusizafapitepe-dumepafidasexom-puwem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366952/normal_5f95d0145cd0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8ac0708a1a8.pdfIn PDF document text
    • https://wimolakerozer.weebly.com/uploads/1/3/4/4/134448160/vexafepofivuten.pdfIn PDF document text
    • https://lamosovi.weebly.com/uploads/1/3/4/6/134600354/jugigodiz-jubokafif-fiwekorobeditu-virumogibe.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/gevuloxaxaretikuz.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/kasuwevovog/rezenolojebi.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/chemical_safety_data_sheet_example.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/non_probability_sampling_definition_types_advantages_and_disadvantages.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/156420726.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/b_ed_ignou_2018_admission_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5923b0bf-e3cc-4ef4-9cbe-cc1df7e9362e/72546227274.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/potovelozow.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/livre_pour_apprendre_le_chinois.pdfIn PDF document text
    • https://s3.amazonaws.com/foneniz/free_bakery_business_plan_sample.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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 3080 bytes
SHA-256: ab4dd7c6bd68149b0114ba6eaa5a37c63f8b8757b7e23d40775f42a159375635
font_01_sfnt_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 4952 bytes
SHA-256: 3c6678737eedb16335d23c011b5bb496f2ca6a49ae4cea0cb61944d28ed1a732
font_02_sfnt_off0001010f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010F 10716 bytes
SHA-256: 02b22749b84a6d9873c887f5a77100f6c814d1fd0a31c6c5b3540f736b62b35d

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