Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e2ac12f583e5e5…

MALICIOUS

PDF

73.7 KB Created: 2021-02-07 14:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 32918cff29b2264d9a4d5754be53cbee SHA-1: 2e8b6a302eb9a54e233cd9c1d77b3dd96cac0466 SHA-256: 42e2ac12f583e5e536d7de4d9e331e5c06642431affebf28aba7eb1a0ee15920
134 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of multiple suspicious URLs and the overall structure point towards a phishing lure designed to trick users into downloading potentially malicious content.

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
  • 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.
  • 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://druttle.ru/123?utm_term=mortal+kombat+x+apk+%252B+data+download+highly+compressed PDF link annotation
    • https://cdn.sqhk.co/rijomawonuj/eifsYjd/ledoroz.pdfIn PDF document text
    • http://nasporte1.fun/macleans_election_platforms_2019zkgym.pdfIn PDF document text
    • http://dikiradojasika.iblogger.org/legal_disclaimer_template.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/iAzif5g/dagikasutanorugireg.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/hchiO9p/zonoserazinamudiru.pdfIn PDF document text
    • https://ravixibede.weebly.com/uploads/1/3/4/5/134584659/6d61af6.pdfIn PDF document text
    • https://cdn.sqhk.co/fomeluxilim/djarChg/captain_henry_danger_2020_cast.pdfIn PDF document text
    • http://xekugesakurupab.22web.org/chiasmus_is_a_form_of.pdfIn PDF document text
    • https://fanizoliboligom.weebly.com/uploads/1/3/1/0/131070566/ae1a199dc.pdfIn PDF document text
    • http://bowuxog.iblogger.org/driver_scanner_brother_dcp-_t300.pdfIn PDF document text
    • https://ruvogoxilukab.weebly.com/uploads/1/3/2/8/132813998/8933696.pdfIn PDF document text
    • https://rilulukopidu.weebly.com/uploads/1/3/5/3/135323077/6314163.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/diwitapezu/58072283000.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/bakidififitozo.pdfIn PDF document text
    • http://vabowako.rf.gd/panasonic_aw-_he40hk_manual.pdfIn PDF document text
    • http://kugibujupedo.rf.gd/electrolytic_galvanized_steel_sheet.pdfIn PDF document text
    • http://pidawuz.epizy.com/national_diabetes_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/dedipa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/gipegatutosivebulubebir.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/13078090902.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_off0000e09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 5956 bytes
SHA-256: d40deda7de4596f7828ea1ec5470f03b5cdc6f60b295ae7a73e75dcf31bbce1d
font_01_sfnt_off0000f4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D9 10632 bytes
SHA-256: 59830c503738ba396e84a95086910b00694e46da72c62ccee39027b51a7d5659

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