Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28fd144d6bcc0cf…

MALICIOUS

PDF

77.4 KB Created: 2020-11-13 02:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 349af0a40ba90c7d8dceff07ddfcc4f1 SHA-1: 5fdb5e5e58fb9f864d930bf79138dfd32356c810 SHA-256: d28fd144d6bcc0cf34100c3c983c640f913a1a902767aad883dd1cea985b8833
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links within the document. The primary URL identified, 'https://trafffe.ru/strik?utm_term=lionel+richie+lady+mp3+download', is likely a lure to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://trafffe.ru/strik?utm_term=lionel+richie+lady+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366371/normal_5f8762ba62d5c.pdfIn PDF document text
    • https://fujireroxilurig.weebly.com/uploads/1/3/4/6/134649353/marinemep_nodisupalid_mezari_gowuzuzu.pdfIn PDF document text
    • https://laverikiwife.weebly.com/uploads/1/3/4/5/134502667/4004344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5f87fa6140bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f94ca8b7672f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_5f9b8b10c4784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5f97c4f0393cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_5fa14fb119ebd.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/25da6f81-10b2-4e6b-b4e8-d3350bc6be59/sukatategid.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/paleo_diet_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/notox.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/tinder_modded_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b153b746-da95-49db-af08-4e9c4ffb9dce/17922280311.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/25786773662.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/best_free_tv_series_streaming_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/kidugodofunose/mountain_guide_osrs_zeah.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010816.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10816 19104 bytes
SHA-256: b573fb365bdff91aba0ab4165b1ffa0b66ef3d55b2a562ae36c023c7c7fbfc16
font_00_sfnt_off0000beba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBA 2640 bytes
SHA-256: 8d08c60432b1dc5f3d887d9fd2fda42021bc2f0f83f128fb24ad1da8e9135ef0
font_01_sfnt_off0000ca66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA66 5432 bytes
SHA-256: 1585b12b22deebef427c795022886a4f2d5a37486201ed6dc682ea95e24669c2
font_02_sfnt_off0000dcd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD0 14472 bytes
SHA-256: a750406ff6d99f6d82540d68dab781cf80f1153b73116c2d186f3a976e544275

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