Malicious PDF — malware analysis report

Static analysis result for SHA-256 58364505052268aa…

MALICIOUS

PDF

68.4 KB Created: 2020-11-26 15:04:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1a8c72de6f57312ed18e90ed9eaede0a SHA-1: 017a1da701ada17b062fa282397266d38e0cd97f SHA-256: 58364505052268aa67456c18388828bcf4a6fc91980401bbbb3482e4e68857e0
304 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.001 User Execution: Malicious Link

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm with multiple URLs, including one pointing to a known malicious redirector, and impersonates Facebook to lure users into clicking on a link that leads to a phishing site. The embedded content appears to be obfuscated, but the overall intent is clearly credential phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/jarozajikateka.pdf.
  • 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.
  • 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://traffmen.ru/wb?keyword=cantilever%20sheet%20pile%20wall%20design In PDF document text
    • https://mivopolidenez.weebly.com/uploads/1/3/4/3/134349928/jarozajikateka.pdfIn PDF document text
    • https://tuverasoxodos.weebly.com/uploads/1/3/4/7/134745130/fofadavoreke-jufuxugifi-raraniz-mapiwapowefapol.pdfIn PDF document text
    • https://jatasurow.weebly.com/uploads/1/3/4/3/134358583/disonajasoz-wetedepapokeka-wuxumezanituni-sogivikiwog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405644/normal_5f91e77b7434f.pdfIn PDF document text
    • https://porimejonawi.weebly.com/uploads/1/3/4/3/134368737/ce15b19b2c8fbaf.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/kosomosob_gevodiwafapoja_bebafa_warerepufiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20560089-24ea-41c7-93af-d0e5e221de12/1316409510.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/guide_alien_isolation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ed4043b-8f46-4cb8-8dea-e58ee619d7d1/fadabaturixatosufotadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a746547d-4ae4-4cd2-9ee6-6ca37d8e8a45/direct_examination_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb7277a3-b68d-47b7-b201-b81441e7eec0/nusedepipuwum.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tinelo.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_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 5276 bytes
SHA-256: e845a8e0609adea6d17cc00b340748dff38238f1b0f8ca08b4d8fc2990732e1f
font_01_sfnt_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 10548 bytes
SHA-256: bc4ed244af79908f78c421a91ff40c7ba94f8034736492183e337c5bff09ab09

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