Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e68da98b6f961e…

MALICIOUS

PDF

117.8 KB Created: 2021-05-19 01:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 680f5329887ad078535e6c21ace7c4e4 SHA-1: b0a133468ea469635a4466ae67da45fc7082c545 SHA-256: 65e68da98b6f961eddeddb98bdb1df975ec9b29e10be118fc01b6aedf4cee754
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=why+is+my+directv+box+blinking+blue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490519/normal_600d8b8012f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476946/normal_601c62feb8334.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/bazadit-bukabod.pdfIn PDF document text
    • https://fozogefijegajor.weebly.com/uploads/1/3/1/4/131453134/a55bde6.pdfIn PDF document text
    • https://vefapabawi.weebly.com/uploads/1/3/0/7/130740427/135264.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_60090d5c2d3c6.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/pebemiler-mizasodisi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_605d196fc648e.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/2561685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_601b01c403fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401982/normal_6008bf9383fdc.pdfIn PDF document text
    • http://derapom.iblogger.org/subabozipakopazekexif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414488/normal_5ff6269d75593.pdfIn PDF document text
    • http://bovinuxunegobi.iblogger.org/zosyn_davis_drug.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/ruzoxobozozidonole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_6029ae8176a7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_6067626f79aa0.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/datarofapakil/how_to_connect_hp_officejet_4500_desktop_printer_to_laptop.pdfIn PDF document text
    • http://dovabaz.epizy.com/33761286304.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/daily_routine_worksheet.pdfIn PDF document text
    • http://pumifobivo.epizy.com/72856871180.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/deepak_chopra_21_days_of_abundance_day_12.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/what_does_the_rear_left_side_of_the_brain_control.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_off00019503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19503 5588 bytes
SHA-256: e15ec0213b8761c8e22ba58020d8cfffdd782e2f194a2e91583a1492af0b8aa9
font_01_sfnt_off0001a7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F9 9824 bytes
SHA-256: 37fbc17ea0469249c07d8ca3189f15fc003d6df4ac0e49cddc639730ecc50dfc

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