Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa369fe02cb1885…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 22:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 223b8cbc802462136620a2a039640c48 SHA-1: 9c2f056ec4f4bab02d2a8fa2764c0e60e59a45b9 SHA-256: aaa369fe02cb1885dbb0288d3d25aec6cb1c0a6ef95a05e96579e7ff74222ea5
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=pilgrim%2527s+progress+2008+movie+download PDF link annotation
    • http://fabermanufacture.ru/13271017974p4qe8.pdfIn PDF document text
    • http://iblack.space/guvisaduxivuvibajagoketeucche.pdfIn PDF document text
    • http://lozomaneje.getenjoyment.net/surah_abasa_download.pdfIn PDF document text
    • http://goldenframecollision.com/zewadosulopasasixiwopuna1tr5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_601e8bceb705a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376371/normal_5ff95ddd68266.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449410/normal_5fcf605fc76cd.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/garrett_euro_ace_vs_250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470681/normal_5fffea855e825.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473919/normal_5fcc76ecad940.pdfIn PDF document text
    • http://tortomsk.ru/lixizamerigeromasegipil2g4c9.pdfIn PDF document text
    • http://biparajakoji.22web.org/depigetoseren.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484993/normal_604a592aac806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475720/normal_5fedae752f119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_5b7d2a141e5843f8aaf571fbcfbe80d6.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_ef3a6569be3e437fad6ed449bb721ffd.pdf?index=trueIn PDF document text
    • http://pavunununege.epizy.com/below_her_mouth_full_movie_worldfree4u.pdfIn PDF document text
    • http://venupelaz.epizy.com/apostrophe_worksheet_grade_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE868 5936 bytes
SHA-256: fcf4397ab4d67a31eb37320114389961eed7861c3afe5726baa8061e76da93c9
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10584 bytes
SHA-256: 8a40986b7b0eedd4f0a5bed7451bdb6550344984c5e689f8139516afc901b35b

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