Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7314777663a9766…

MALICIOUS

PDF

120.5 KB Created: 2021-03-15 03:18:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63b138b8e2c1ec26e65f9743c763fd8e SHA-1: 10a06b90944077254a54514c5508defba2b295fb SHA-256: d7314777663a9766c9ae40b341c70809ff3b1625148b33b7f1bd6406bfa6ddbc
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 to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a phishing or malware distribution vector, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/award?keyword=legal+service+authority+act+1987+bare+act+pdf
    • http://afterdealer.pro/19508526247otf3c.pdf
    • http://dutov.org/about_a_boy_imdb_parents_guidedgy8u.pdf
    • https://zovamegazojuji.weebly.com/uploads/1/3/4/8/134849063/1770084.pdf
    • http://rent-nout.site/2000_ford_ranger_fuse_box_diagram048ai.pdf
    • http://nikecortez.net/anemia_megaloblastica_caso_clinico8eo25.pdf
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/1573f5157323.pdf
    • https://gozivuwedigati.weebly.com/uploads/1/3/4/6/134612943/9085080.pdf
    • https://jeduwenerapowi.weebly.com/uploads/1/3/4/6/134678879/43948d80a61.pdf
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/1178260.pdf
    • https://kazikuxixaremu.weebly.com/uploads/1/3/0/7/130738513/d9bdb12197.pdf
    • http://rukunikuxajosog.22web.org/88575277930.pdf
    • https://nogojajefe.weebly.com/uploads/1/3/5/3/135314992/6809a0.pdf
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/juboleza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_b3a31755c96c4e7f8412214950aa1b37.pdf?index=true
    • http://zopibekaboxopa.epizy.com/the_book_alan_watts_goodreads.pdf
    • http://fefomuk.epizy.com/answers_pet_food_bulk.pdf
    • https://s3.amazonaws.com/zonebon/12221330349.pdf
    • http://xuwomotibinifen.rf.gd/architecture_college_magazine.pdf
    • https://s3.amazonaws.com/liluvad/reporter_processo_datena.pdf
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_c3ac2a0ecaff4f6dbff7af741b0ad93a.pdf?index=true
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_6a57e44553cb49f19c96412c6ec005b0.pdf?index=true
    • http://javolijokexike.epizy.com/model_3_long_range_rwd_or_awd.pdf
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_9fa51712475249f5be08bdd888e5a014.pdf?index=true
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_031c26928d1c4880b2d4c9ed6858c4f4.pdf?index=true
    • https://s3.amazonaws.com/lopeteb/badri_tamil_video_songs_free_320kbps.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018d21.bin
f217efca88ddfe145e0a7164f877156054a1253e56f5c7b1c715fea4e8d9e765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D21 5916 bytes
font_01_sfnt_off0001a171.bin
69cab69f7eba0535dfec1556bf253d19bbfe8a73e9d5f8b17f881404b76da5f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A171 10416 bytes
font_02_sfnt_off0001c53c.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C53C 4324 bytes

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