Malicious PDF — malware analysis report

Static analysis result for SHA-256 f63e0176b3a57d61…

MALICIOUS

PDF

65.3 KB Created: 2021-01-03 12:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 931c372fb821ad32ef8763bb1a55c6cf SHA-1: 7314be8805f21437ad403f8537da11cdfc7cc4b2 SHA-256: f63e0176b3a57d617b50a3b4f2c99baf0644c0e5f97adfd198e842cd5e21e49e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URL 'https://trafffi.ru/aws?utm_term=yanni+nightingale+mp4' is a primary indicator of malicious intent, likely leading to a phishing page or malware download.

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://trafffi.ru/aws?utm_term=yanni+nightingale+mp4 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408188/normal_5fa4a6159d87d.pdfIn PDF document text
    • https://sevivuninuk.weebly.com/uploads/1/3/4/4/134459749/d8586.pdfIn PDF document text
    • https://tawugeri.weebly.com/uploads/1/3/4/7/134774142/036e0ae.pdfIn PDF document text
    • https://rimimasosonajis.weebly.com/uploads/1/3/2/6/132681992/zekavij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fbdf66eee1f7.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/b33d14af98c65a.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/lewuli/magical_aromatherapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443614c4-a49c-4d36-bd83-2909c665537c/psychology_applied_to_modern_life_11.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/google_account_manager_7._0._1_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff4d592-1fdc-4267-806a-dfc2f2d3938f/tri_state_bus_schedule_midway.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/braun_series_9_9095cc_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/1286544998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2fed06-60d1-4187-91b5-e402cdc19e0f/29828972000.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/sivafuxezefudewitoxedolur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992f5c95-c820-4544-b22b-96e47c1b96c6/ea_sports_ufc_4_patch_notes.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_off0000c169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC169 5008 bytes
SHA-256: a9eb7cdf724fed22102f03d6cb934783738751c739de79ef212bc18bb3e6c3f6
font_01_sfnt_off0000d25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 11536 bytes
SHA-256: be03904b88a9ca21338054305e528cecd9794ffec3c9c59a0c7f53526ab275a4

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