Malicious PDF — malware analysis report

Static analysis result for SHA-256 d255fc1bddee461f…

MALICIOUS

PDF

100.7 KB Created: 2021-02-02 07:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc088eebc91088c43e683df7291b820b SHA-1: 0841921ce36655d92b279e61e1d443f9ff6f1cd3 SHA-256: d255fc1bddee461fb493223745c6d56282a07887bd874cfedc7882cec8f4f56a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/aws?utm_term=annual+report+catur+sentosa+adiprana+tbk PDF link annotation
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/d572961cc56cf5.pdfIn PDF document text
    • http://onlinetiser.website/juwixiwubavosea316c.pdfIn PDF document text
    • http://1eyvgo.xyz/francis_ching_architectural_graphicsnknii.pdfIn PDF document text
    • https://cdn.sqhk.co/bebiwamulanu/bgh0Lgf/vewururejubelavonodawo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403556/normal_5ffed3319ba54.pdfIn PDF document text
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/e7807c84974b3.pdfIn PDF document text
    • http://reabook.online/1952952150563xz0.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/wutuvuwufudunuge.pdfIn PDF document text
    • https://cdn.sqhk.co/xupasutejos/eY0jbew/67100022609.pdfIn PDF document text
    • http://hugertely.xyz/jusozuvatipuw0noeq.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/81d64a8df2c4.pdfIn PDF document text
    • http://skidki-day.site/gunshot_smoke_pngstz8q.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewejav/geGjdz0/norefurer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484114/normal_6005b5459f79c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ff0ed95ee348.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ZVhbbgi/zombieland_3_release_date.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/kubedukowug/big_ideas_math_book_answers_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/cambridge_young_learners_english_starters_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/novexev.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/63378614235.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_off00014c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C1B 5260 bytes
SHA-256: e944835bb0424d3ab90c90f0b4a46949e4c8e4f08eae5323bad99fec14cc3957
font_01_sfnt_off00015e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E03 12156 bytes
SHA-256: bde00fb695ef19afa0ee939abd555c1e9706b99c848c455adf71e4c297e786d4

Open this report in the interactive analyzer, or submit your own file for analysis.