Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f482e8e712ddeeb…

MALICIOUS

PDF

82.3 KB Created: 2020-11-25 15:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e174a214f51ee30f5aede68ac6220c7e SHA-1: efbcbea0748e79279f5c847d863ba171919119a0 SHA-256: 4f482e8e712ddeeb34277dc5e36bf6eac0018cd790901ddd75e3dec5f44095e5
214 Risk Score

Malware Insights

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

This PDF file contains a link farm and redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded content, though obfuscated, suggests a lure related to 'new malayalam movies online watching'. The presence of multiple external PDF links points towards a phishing or spamming campaign.

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=new+malayalam+movies+online+watching In PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5fa7782f23535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5fa267fb0d641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5f937d1515e67.pdfIn PDF document text
    • https://tetizapafatig.weebly.com/uploads/1/3/4/6/134634663/74605775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f9212648d291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5fa3adf096620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f893c563e9cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375528/normal_5f8b5e8e2a90d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468820/normal_5fbd3e2c98e34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f94f20833225.pdfIn PDF document text
    • https://zafovuzixo.weebly.com/uploads/1/3/4/5/134588091/geximuniwe_fumavegisakabep.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/5847381d-6d5b-49dd-82d9-c03de55d1e73/96325044475.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/acidoctose_diabtique_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fc7700-6794-44f0-863b-e98b2836a71a/dragon_age_inquisition_letter_from_a_lover.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_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 5340 bytes
SHA-256: 67da92d5ec5ff31a74745a535c1aaef514714b9ec28b8df89b178fff2aa04f96
font_01_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 10664 bytes
SHA-256: 40ef81ef83cea99c74909c0e08c8c4cd53f7e759b66e5416713e6d142812421c

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