Malicious PDF — malware analysis report

Static analysis result for SHA-256 91987e07abcbe2bb…

MALICIOUS

PDF

69.0 KB Created: 2020-12-05 22:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 196aeccb135d3d6b5f40ba8b8d3b6a8b SHA-1: 815264ab46572987362138ae83a4e92e8a254657 SHA-256: 91987e07abcbe2bba7f434719939b0b0aa5295517433dec14ba494eae528df16
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://traffking.ru/strik?utm_term=individualistic+culture+definition+psychology', is flagged as unknown reputation, suggesting a potential malicious destination. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware delivery.

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://traffking.ru/strik?utm_term=individualistic+culture+definition+psychology PDF link annotation
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/8197985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5fa1c2dd772dc.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/7616387.pdfIn PDF document text
    • https://xizogezoki.weebly.com/uploads/1/3/4/7/134717510/dosazipana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_5fbf178e201bd.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/0e1fbb6e7.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/0505e539-2d0a-4a30-8555-c073a71b2637/pegozuratexedabefinaza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f56dd26ff1194f8deacd/t/5fcb206c64036b6143883726/1607147630371/hp_smart_printer_app_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcef449d104e5f152c78ec/1606217543052/72161701779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650a673b-9b7b-45bb-8499-bb8d96dcc9eb/45622997556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697f1a84-2bce-4df9-b316-e17f85c348e4/mawatasidut.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf88e18e72e5fdb9c94a7/1606285454888/45208276772.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e006a879396864083677/t/5fc1f7bfa97599144e3d3477/1606547391918/honeywell_quietset_tower_fan_hyf260_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5608abe9b69395128be43/t/5fcb5f5f1415195da0846a7a/1607163744474/rozilujoxojowomawi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0df209955c744b53b696b/t/5fc1634b2dd96f5918236471/1606509388588/91970977736.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf718145a8629dc7637c1/1606285094376/92936999705.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_off0000d092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD092 5516 bytes
SHA-256: 0c8e1c342faa744a6bf898f22572e64a02b0e7e4e9d5b99a6202ebcad12ce550
font_01_sfnt_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 10400 bytes
SHA-256: 886c84f4b3a223b99161510fef78fcf850029ed1807ccff8a249a7864edb6465

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