Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24c4ff9339ae4b0…

MALICIOUS

PDF

100.7 KB Created: 2021-05-07 01:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 99a709eb7affe19dec8fdd5d625dd4cb SHA-1: 84fc969c28aae855c972ce12727c35476f396015 SHA-256: d24c4ff9339ae4b0f31a61d9f57ebe3ed84e3d45bf574197d29c5de38631b2ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm and has been flagged by ML classifiers and ClamAV as malicious phishing content. The embedded URL, 'https://ponafet.ru/strik?utm_term=how+to+use+ipega+bluetooth+controller', is presented as a guide but likely leads to a phishing site. No scripts were extracted, but the PDF structure and external links strongly suggest a phishing attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ponafet.ru/strik?utm_term=how+to+use+ipega+bluetooth+controller PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5fd6351794119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461201/normal_6028b3d2b0cee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_605db1f0e80d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5ffbab8407cca.pdfIn PDF document text
    • http://itasda.online/kobugatebenako8jnx.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/igjgigA/fashion_storyboard_template.pdfIn PDF document text
    • http://hotloveme.online/ap_biology_exam_practice_questionsodj3t.pdfIn PDF document text
    • http://torevifij.iblogger.org/autumn_s_grey_solace.pdfIn PDF document text
    • https://cdn.sqhk.co/batitiviz/GjhVghO/19151036535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_848c1c04bc3b4d1cbbc5caa6205c835c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/how_to_log_into_your_old_icloud_account.pdfIn PDF document text
    • https://16cc4848-9a85-487f-bc1d-da55f68f8448.filesusr.com/ugd/dcf86b_9d6c178324474e7ca4281b33d489f5ee.pdf?index=trueIn PDF document text
    • http://nuzebavin.epizy.com/wusipowuzabelena.pdfIn PDF document text
    • https://2c2d0fef-d1d6-4038-bc39-4f89cae3d2d3.filesusr.com/ugd/7dd30d_2378ab48f76e4e27b47d40a4e5810eb0.pdf?index=trueIn PDF document text
    • http://ralemagafi.epizy.com/tufosoxajepo.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/43840691535.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_ec1855a3a2624726a25d467a6bd6e657.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/motorola_g6_plus_phone_case.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_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 5388 bytes
SHA-256: 6a25c821b9ee5ecbabd1ee9896eb2ce078c866fb220feb37ac0a138941574cd1
font_01_sfnt_off000142a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A2 11728 bytes
SHA-256: 9cc9607bba8f75303d0b9041b93b724dd0f063e9a28e73f622f0e7a7f4028509
font_02_sfnt_off00016ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AB2 7968 bytes
SHA-256: 5674e73ff7e3952168ff57d14b79dafc03d02d748a609b0ca630114105c7d216

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