Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d62f6c45958d535…

MALICIOUS

PDF

80.6 KB Created: 2021-03-03 07:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a45da9e69b09daeb78830dfaccb21d88 SHA-1: ebc9ebc84de1689dc2e0413a2b3ee1270f4ee78f SHA-256: 4d62f6c45958d535c0066d27d9f598900032d5d46a2ba6e2424580970616b85e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to 'hack apk' and application versions, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=true+skate+hack+apk+2018 PDF link annotation
    • http://feldhaus-klinker-plitka.ru/30841067034xjtho.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/uglys_electrical_references_2020_edition_6th_edition.pdfIn PDF document text
    • http://votixowet.22web.org/fleece_bed_sheets_primark.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/oR96xjh/zazazorumenaluwoze.pdfIn PDF document text
    • http://venira.su/gumulesinejanasarugeseposz96p.pdfIn PDF document text
    • http://scandisvet.ru/32677722409v26hd.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/tomitik.pdfIn PDF document text
    • http://lejebodaz.22web.org/encyclopedia_of_drawing_techniques.pdfIn PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/weight_watchers_scale_user_manual.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/mabifaresusibapetodowixup.pdfIn PDF document text
    • http://mbfsopg.com/jewel_match_blast_classic_puzzle_games_free1ggv4.pdfIn PDF document text
    • http://justiciaforjustice.com/fetobovewyl0wt.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/73147089057.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovigogijexivof.epizy.com/telitowus.pdfIn PDF document text
    • http://nivobilov.epizy.com/kasus_anoreksia.pdfIn PDF document text
    • http://zajepatexesa.epizy.com/free_hershey_candy_bar_wrapper_template_word.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_off0000f933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF933 5520 bytes
SHA-256: 808d11686a885b62db228093d233052e795475ee0722a8ac52a0942c35517311
font_01_sfnt_off00010bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 15020 bytes
SHA-256: 6fb0314f85304de8ad1454e04acd883b731a2433e3310bcb5647af3090283ae8

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