Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6d1002aa4ae791…

MALICIOUS

PDF

84.0 KB Created: 2021-01-18 02:00:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5e201600e42adc66a227ea005e79eaf5 SHA-1: b7497b563e63f1ed134ead441dc4264fdbe78f8d SHA-256: 4e6d1002aa4ae791c4970250a0334d0e31336096487ae88208d5291f6237e601
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm hosted on disposable domains, with numerous embedded URLs pointing to potentially malicious content. The presence of external URIs and the 'link farm' heuristic strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://trafficel.ru/123?utm_term=career+cruising+sumner+school+district PDF link annotation
    • https://site-1177516.mozfiles.com/files/1177516/fobolumes.pdfIn PDF document text
    • https://site-1173528.mozfiles.com/files/1173528/recargas_rapidas_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f994e377b26f.pdfIn PDF document text
    • https://site-1257397.mozfiles.com/files/1257397/business_expense_template_for_numbers.pdfIn PDF document text
    • https://site-1168247.mozfiles.com/files/1168247/runescape_maple_tree.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8ff7390d215.pdfIn PDF document text
    • https://site-1176216.mozfiles.com/files/1176216/best_books_on_buddhist_philosophy.pdfIn PDF document text
    • https://site-1232858.mozfiles.com/files/1232858/lurufedonupa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fec0966435cd.pdfIn PDF document text
    • https://site-1253089.mozfiles.com/files/1253089/697358929.pdfIn PDF document text
    • https://site-1177446.mozfiles.com/files/1177446/wsj_guide_to_personal_finance.pdfIn PDF document text
    • https://site-1176697.mozfiles.com/files/1176697/coliform_present_in_water.pdfIn PDF document text
    • https://site-1234129.mozfiles.com/files/1234129/33201858012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385620/normal_5ff47228a94bb.pdfIn PDF document text
    • https://site-1174122.mozfiles.com/files/1174122/97785710226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f97a83e7ac23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagelenobom.epizy.com/fotuwotirizoxekusi.pdfIn PDF document text
    • http://rubujizuz.epizy.com/9245378971.pdfIn PDF document text
    • http://lozadubevapoke.epizy.com/lany_valentine_s_day_piano_sheet_music.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_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 5260 bytes
SHA-256: a7a977d1f6e15eb24b67d32f73af0a1002c5ce62485d34ba17737600a0477921
font_01_sfnt_off00011cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF2 11188 bytes
SHA-256: 0c2048f44848c442e37a64f79a8f3c0ec631dc089f6ab7386a88e4881a26d5aa

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