Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb5111e987ab7f7…

MALICIOUS

PDF

80.4 KB Created: 2021-03-07 02:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: cee32118b0bcf5f7aab478cf38eb58f8 SHA-1: b316d8eb0f8a489f2c29d7715d540710ec630865 SHA-256: 8cb5111e987ab7f7034d9d8253ce3415caf9eac9959b9e323a87e56fa74509b2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, indicating a link farm or phishing attempt. The embedded URLs suggest an attempt to redirect the user to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/strik?utm_term=abe+international+business+college+tuition+fee+las+pinas PDF link annotation
    • http://birjand.design/coleman_saluspa_inflatable_hot_tub_error_codes7qvuk.pdfIn PDF document text
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/ddd6b5a1bd090d.pdfIn PDF document text
    • https://tufanemoxidubux.weebly.com/uploads/1/3/4/3/134315727/42dda2ef85031a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_602b6e74424e2.pdfIn PDF document text
    • https://sisekiki.weebly.com/uploads/1/3/4/6/134622657/mafirevuj_famofakomowovot_fogifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465691/normal_60337a8e7b403.pdfIn PDF document text
    • https://lulujazopo.weebly.com/uploads/1/3/4/7/134769354/masuni.pdfIn PDF document text
    • https://xomijati.weebly.com/uploads/1/3/5/3/135329577/a2850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_6014e3c8e8709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_600518f89883f.pdfIn PDF document text
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/vexadekinene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446016/normal_5fcef9ec95269.pdfIn PDF document text
    • http://fruitik.space/gdpr_breach_reporting_guidancel260c.pdfIn PDF document text
    • http://zujewap.mygamesonline.org/37070489859.pdfIn PDF document text
    • https://fifofisepag.weebly.com/uploads/1/3/5/9/135985139/bubulamore.pdfIn PDF document text
    • https://wefigofotagovir.weebly.com/uploads/1/3/4/8/134864379/fc1c15918fab0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/leributafa/37984117406.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/69314576486.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/71717646692.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/26728438794.pdfIn PDF document text
    • http://suvalomimo.atwebpages.com/95352226432.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_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 5196 bytes
SHA-256: fd53f24347359c8454fb3d071d50136802bd1e205a490c6aff593ba00c18b553
font_01_sfnt_off00010153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10153 10996 bytes
SHA-256: 32428d2a577b7f08a9a0785698f74e4255a8c7e90b014d44bfd8a892b3157a2f
font_02_sfnt_off000125b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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