Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5715e89acfdaddc…

MALICIOUS

PDF

61.8 KB Created: 2021-01-26 08:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: edcc2f720a607fcbcae96af623da8b44 SHA-1: e7b23e00afc9f1d6f9831501212453082bfffd33 SHA-256: e5715e89acfdaddc6026b925938b62b4c780e4b5e546ed592db522233a1bea7b
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting services and a known malicious redirector. This indicates the document's primary purpose is to act as a link farm, likely for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=elsevier+clinical+textbook+workbook+answer+key+chapter+3 In PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/9d72db27bbb.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/W3OnZVh/caillou_goodnight_song.pdfIn PDF document text
    • https://kuboteradaragi.weebly.com/uploads/1/3/1/4/131482952/8971817.pdfIn PDF document text
    • https://faxakitowe.weebly.com/uploads/1/3/1/4/131437357/814286f.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/y15gdha/battleplans_mod_apk_1._13._40.pdfIn PDF document text
    • https://gazasajud.weebly.com/uploads/1/3/4/8/134879445/jovoti.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/simizolu-kisunes-xameboxure.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/rofezowobotunibeki.pdfIn PDF document text
    • https://pexerewiku.weebly.com/uploads/1/3/5/3/135313352/rimelijetabajim.pdfIn PDF document text
    • https://bafuvigugasud.weebly.com/uploads/1/3/5/3/135308410/2920c091d4.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/tezev.pdfIn PDF document text
    • https://lidutefavova.weebly.com/uploads/1/3/4/0/134012516/wafojidofof.pdfIn PDF document text
    • https://titobabedax.weebly.com/uploads/1/3/4/3/134317276/7549436.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/jubiferekaka/63757135206.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/6224412793.pdfIn PDF document text
    • http://dudolisimak.epizy.com/blender_2._79_1.pdfIn PDF document text
    • http://lujuxug.epizy.com/remawadibukixu.pdfIn PDF document text
    • http://diruxepuf.epizy.com/20040690865.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/samsung_allshare_iphone.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_off0000b4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EB 5668 bytes
SHA-256: 259712327c374eb4ba1582f1befdbb8841640c571eafaf97704dbad14b2d8c7b
font_01_sfnt_off0000c850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC850 9180 bytes
SHA-256: 051324f49fdc526fbfa6ea41408685646e0c370a4eef53b4f13c8fc1b99fe6fc

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