Malicious PDF — malware analysis report

Static analysis result for SHA-256 976ff8ad7410ae91…

MALICIOUS

PDF

77.1 KB Created: 2021-02-23 01:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4d0cebed018c346fbeeb171a6d5c92d1 SHA-1: b6ce0b75a3fe497b05d53c749805881032190ef4 SHA-256: 976ff8ad7410ae9110e574d40248454b6fc1a3d566e4cf833eeb7ffa0e55f63b
134 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a notable heuristic identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggest the document's primary purpose is to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=ronco+7+tray+food+dehydrator+instruction+manual PDF link annotation
    • http://sexedate69.site/setbackgroundcolor_android_xamarin5p1yb.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/ha91ifQ/gewitimelefumalovov.pdfIn PDF document text
    • https://gizetaxawu.weebly.com/uploads/1/3/1/8/131871526/jamakegimijulagotur.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/7Nidheo/infection_control_nurse_salary_in_uae.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/fPOicvH/45951833676.pdfIn PDF document text
    • http://zazuvivilug.iblogger.org/96850846966.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/geifhfU/dapegigogalow.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/xuvamuba/sarawuxexolafimudanepe.pdfIn PDF document text
    • http://bukinajomo.epizy.com/mastizaade_full_movie_720p_filmywap_2016.pdfIn PDF document text
    • http://joxelugokolutu.rf.gd/ieee_research_paper_format_example.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/lucky_block_mod_for_minecraft_pe_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/vaste_song_mp4_pagalworld.pdfIn PDF document text
    • http://toxiramagelovit.epizy.com/charlie_puth_song_how_long_free.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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 5448 bytes
SHA-256: 9f317a88b458d622072956823d0691242cb536312183366c3912f3e9bfe0a3ae
font_01_sfnt_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 11560 bytes
SHA-256: 49e764d66fc44dcd5f91c7fceef1b60f454366d72dbd831a14e63f6eaef07f35

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