Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64d965d035de4d6…

MALICIOUS

PDF

67.8 KB Created: 2021-01-17 11:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b9bc6123a41b13b7d1ccbc3410a9d6cc SHA-1: 96b9953a064f6828ba99af0e0704bebb1f0a4f29 SHA-256: c64d965d035de4d688340581e0129263eacbef6e07bf9fcc54042be522c71c50
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or SEO spam campaign. The embedded URL 'https://traffset.ru/aws?utm_term=happy+birthday+bhaiya+name+cake' and numerous other Weebly and sqhk.co hosted PDFs indicate a pattern of redirecting users to potentially malicious or ad-heavy sites. While no scripts were explicitly extracted, the PDF structure and link farm nature strongly suggest an attempt to drive traffic or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffset.ru/aws?utm_term=happy+birthday+bhaiya+name+cake PDF link annotation
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/berusorewe-gipod-danekanu.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/Xgjlta5/candy_bomber_100th_birthday.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407777/normal_5ff17682ae1e2.pdfIn PDF document text
    • https://vugevosuza.weebly.com/uploads/1/3/5/3/135328642/5494530.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/04jgvmE/airasia_live_chat_agent.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/DIjegiw/43463234292.pdfIn PDF document text
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/e047df93686100a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5ff1b8fe07989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495551/normal_5fd26bd5b0c60.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/hgjhjgM/53465183290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5fc6b9b2ca1ab.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/gekixadonuru/static_electricity_worksheet_ks3.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/acapella_untuk_fl_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/affairscloud_static_gk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/android_emulator_ios_9.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/10816316154.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/65376926018.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/grease_summer_nights_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/advantages_and_disadvantages_of_socialist_economy.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB75 5372 bytes
SHA-256: 427085f6e9aec85f6ec268ed9317725a5fbde5ffffe25903bd46c92490a4314f
font_01_sfnt_off0000dd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8C 10808 bytes
SHA-256: 12a856b1fb49758047c08b540f7c84b3090a5d620ffe1393dcdd68d535c0a21e

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