Malicious PDF — malware analysis report

Static analysis result for SHA-256 b030b2ccf65c0c17…

MALICIOUS

PDF

74.0 KB Created: 2021-03-03 00:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c7204e0cc260b2bcf81a6e24bf49e50b SHA-1: 7e0108d56bdcf68f35f6faac3659f8920605d877 SHA-256: b030b2ccf65c0c17876c9ef28625997c150bc642df16bd733b2f15b395bbeabc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers identified the file as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites, possibly as part of a phishing campaign or SEO manipulation scheme.

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 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://resalured.ru/strik?utm_term=what+states+ban+single+use+plastic+bags PDF link annotation
    • https://cdn.sqhk.co/sadopore/gdjibha/monster_truck_movie_free_streaming.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/ghKdqgc/pause_challenge_remote_brent_rivera.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/Ugj3YWb/wamimexobuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/id2hdhh/amazon_music_unlimited_echo_dot_1.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/1668656.pdfIn PDF document text
    • http://trylait.pro/65336691752d2586.pdfIn PDF document text
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/5208005.pdfIn PDF document text
    • http://lg-supportteam.com/991785710919hcby.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/tasufagijaremo/49490006645.pdfIn PDF document text
    • http://wekidezeze.epizy.com/eu_ageing_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/ppt_free_templates_2019.pdfIn PDF document text
    • http://sozazavore.rf.gd/gmat_unofficial_score_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/dugipezagujemolopifo.pdfIn PDF document text
    • http://wubezirinipo.epizy.com/how_to_do_pull_ups_with_a_resistance_band.pdfIn PDF document text
    • http://fupewazogapoda.rf.gd/will_there_be_a_series_of_unfortunate_events_season_4.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_off0000e55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55B 5252 bytes
SHA-256: 2a1a1f8189b198be971e344a610de8f76b9fa96284844af09d85f284b280c2a4
font_01_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 10028 bytes
SHA-256: 3b09c5805f1e47bc49d4f16d4483b864f47ec3fb74d5c55007fae9a0942c354d

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