Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3474a3a6dba5ee…

MALICIOUS

PDF

81.8 KB Created: 2021-03-11 03:04:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d63d79a7e55624bd2da8de7222be6c45 SHA-1: 3c7848736e9dc2b2bce85f412082145023921d2a SHA-256: 4e3474a3a6dba5eeac3e0b779335333a5ba8b95c9499c9b7affb2c35254484f6
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://kuzutuzo.ru/wix?keyword=asd+vegas+2020 PDF link annotation
    • http://comforfemj.fun/nemowilimaginesizabilozijgbscc.pdfIn PDF document text
    • https://konovupifa.weebly.com/uploads/1/3/0/7/130775136/5999292.pdfIn PDF document text
    • http://astropsychology.website/65919963693thpi9.pdfIn PDF document text
    • http://fumigatoff.online/39834674168enkhj.pdfIn PDF document text
    • https://xakalawuvobovu.weebly.com/uploads/1/3/1/0/131071286/ledinamedep-wezafedonik.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/uQjen4X/light_up_pvc_vine_deer_family.pdfIn PDF document text
    • https://lunipudazu.weebly.com/uploads/1/3/4/4/134462877/nasojo_namidozufo.pdfIn PDF document text
    • http://electriccannoz.club/60999325219f54r8.pdfIn PDF document text
    • http://tapopapebesawu.getenjoyment.net/chaitanya_charitamrita_english.pdfIn PDF document text
    • http://thechambre.xyz/848851442718j7a4.pdfIn PDF document text
    • http://poradoit1.site/joseriwopotrda7f.pdfIn PDF document text
    • https://cdn.sqhk.co/gutemokerezo/Vje9hdq/sing_ding_a_ding_a_dong_christmas_song.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/2MGhgig/2015_all_malayalam_movies_box_office_verdict_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/ig5pjbx/modavuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiseleto/aNRjbec/gigedofara.pdfIn PDF document text
    • https://nolobatunu.weebly.com/uploads/1/3/0/7/130740420/eac2a3f70ae7f.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/jjuG7Wd/98448527774.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/43711573567.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
    • http://radiviwix.onlinewebshop.net/living_forward_aba_marion_indiana.pdfIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/how_to_adjust_stride_on_fitbit_charge_2.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF075 2456 bytes
SHA-256: 0beff06e580d35878ef7bf750caaa2a270d1aed09a172ec2775f07c9290db17a
font_01_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 5188 bytes
SHA-256: 66b77012a7373274de087ba31408a6c33025786f2d5cc1610b2c7d75f701c528
font_02_sfnt_off00010d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D69 2080 bytes
SHA-256: c941a6e8f805a17c0018aef06e3ddea50561ccd7d58aa3f9a4ef5d6380c63caf
font_03_sfnt_off00011674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 10216 bytes
SHA-256: 78d0b19702768f1df05fca229b686fed11bf175056909b16cabc1e25513acfb5

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