Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63cfa705a3fdeea…

MALICIOUS

PDF

72.7 KB Created: 2021-02-25 01:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6f12330713b2b007ebbd2f08a0d11f19 SHA-1: 220bc9d1ad56892b2c830596ca7cc6cebc9a1ad5 SHA-256: b63cfa705a3fdeeaae3a1400dab8bf5a5ea731e128fa83735f72a499b69bb141
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various websites, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of embedded URLs and the overall structure strongly indicate a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wb?keyword=quadratic%20equation%20practice%20problems%20with%20answers%20pdf PDF link annotation
    • https://legotukalijev.weebly.com/uploads/1/3/1/3/131380351/kekop.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/15797386564.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/Ljahbxm/12856034987.pdfIn PDF document text
    • http://rasudilikid.mywebcommunity.org/scribus_tutorial_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425224/normal_5ff9d9351eed4.pdfIn PDF document text
    • https://tabetigilazewa.weebly.com/uploads/1/3/5/3/135392987/3381047.pdfIn PDF document text
    • https://cdn.sqhk.co/detaludolef/imgfsgh/68414306755.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/jowizet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_6010f6913eeb1.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/Pbbihgb/14735416101.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/44820548431.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/why_is_my_keyboard_not_working_on_minecraft_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/2J2rsjw/4518800005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_5fd2c651cdad8.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/jcgcoVR/xupifewexaraxewokabu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417318/normal_6007dfba82dec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391305/normal_5ffd66a739186.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/jjaiijf/satonapisapalivirejeni.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/sikuva/esl_worksheets_science.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/76780249245.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_off0000d7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FA 5812 bytes
SHA-256: 18a0716113204f8829b48b9c11bbb48c1fc34d72811adc77cc30612462f696cf
font_01_sfnt_off0000eb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 11628 bytes
SHA-256: b6303d29b1b2f880daff0836c6a5198a9ef277fc54da06bb9463aaf618e733f1

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