Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c667ed9194a6ff…

MALICIOUS

PDF

74.1 KB Created: 2020-11-14 10:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c585b603b179bea3433dd8be44702dc0 SHA-1: c04fc48735b539a3d6a39c29e48d22feb862d4cb SHA-256: c6c667ed9194a6ff3036f3fd847ed4e5e3c6751b0c60da40448752016f823f2a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. The embedded content, though obfuscated, suggests a lure related to 'Android 10 release date for samsung m30'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

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://traffset.ru/aws?utm_term=android+10+release+date+for+samsung+m30 PDF link annotation
    • https://javumegibevi.weebly.com/uploads/1/3/4/6/134634398/1056718.pdfIn PDF document text
    • https://kepubaxolawava.weebly.com/uploads/1/3/4/7/134703856/7c815cfebc.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5f9bfcfcb4fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_5f913ea49e9cc.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/637387.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/b893a7593d8e.pdfIn PDF document text
    • https://lubukapilibuvi.weebly.com/uploads/1/3/4/0/134095968/dawisega.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/jozetej/drishti_current_affairs_today_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/criminal_law_book_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ccb012-c990-4de9-8f5e-866a8cc60fd9/bujunapof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32873001-c6fc-478b-ac64-f955031f1f26/cress_marissa_meyer_vk.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/senior_girl_scout_badge_requirements_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/33091196964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c672fcab-330d-4e3c-966f-4589daee43c7/76602009176.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/bible_verse_about_pulling_down_strongholds.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 5572 bytes
SHA-256: c8b391ba02589a79e78b84ebd889dd7e20e2b45100c10860b60120e78879216c
font_01_sfnt_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 11004 bytes
SHA-256: 08972d7d1bf087e9dba53708ad2137e38ccdb2a9bd840846a297ce86ce69cec1
font_02_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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