Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e03e7cdb34e9f5…

MALICIOUS

PDF

72.9 KB Created: 2021-03-24 12:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad99a420a8785e568ab707ea29c2dd22 SHA-1: 90e7b7498d6a4ed9546192809ff798d80a89c270 SHA-256: 65e03e7cdb34e9f5ed03311c1a914010a552bfe2b16a2498ae771f77bc93feea
186 Risk Score

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://fokemale.ru/wix?keyword=ap+gov+unit+2+study+guide PDF link annotation
    • https://cdn.sqhk.co/zanotunuzi/Q4ggUii/alabama_human_life_protection_act_full_bill.pdfIn PDF document text
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/f82c3a0a29723.pdfIn PDF document text
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/2b1d0e981c55ae5.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/managigasibu-tapoje.pdfIn PDF document text
    • https://nukanepinax.weebly.com/uploads/1/3/1/4/131454046/e6e401f5cba87a7.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/ophthalmology_books_free_download.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/ratevebew.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/e2Ige3W/revudejulajavovowasepolix.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/bTo4tih/8544257225.pdfIn PDF document text
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/9117455.pdfIn PDF document text
    • https://burakatotofok.weebly.com/uploads/1/3/1/8/131871829/098105e59794b16.pdfIn PDF document text
    • https://jenogisemelo.weebly.com/uploads/1/3/2/3/132303080/nadakogud-mibirud-lokaxapibevor-wevebanuga.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/doxokawegutire.pdfIn PDF document text
    • https://nodirerivono.weebly.com/uploads/1/3/6/0/136052085/jusegatavajub.pdfIn PDF document text
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/delodakugi.pdfIn PDF document text
    • http://disozire.mygamesonline.org/dixujemolad.pdfIn PDF document text
    • https://kizubunutasi.weebly.com/uploads/1/3/5/3/135348794/telidedujebujedufu.pdfIn PDF document text
    • https://sojizekupiguj.weebly.com/uploads/1/3/4/5/134586608/jonedopugafa_junuladetuwuxu_dozuxoxoven.pdfIn PDF document text
    • https://torevoxun.weebly.com/uploads/1/3/2/7/132712334/2690222.pdfIn PDF document text
    • https://wafitaweligu.weebly.com/uploads/1/3/4/5/134587259/kibapeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipejefanowisu.atwebpages.com/logic_questions_in_telugu_language.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/anelidos_y_moluscos.pdfIn PDF document text
    • http://kepawomokatuke.myartsonline.com/rabilikuxoze.pdfIn PDF document text
    • https://s3.amazonaws.com/dogevazapiwediw/assassin_s_creed_odyssey_guide_officiel.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_off0000dd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD39 5072 bytes
SHA-256: b3f9dc9e7e511d547dc98496cf88185c812a7c92a51668ac963c66b0d3ca023d
font_01_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 11512 bytes
SHA-256: acc158c6183053313f70bf3d8160815021b55031cecde83ad3bac3d39fec97ee