Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5fd0abff111bb5…

MALICIOUS

PDF

80.1 KB Created: 2021-03-16 11:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ab26bdd418c2f10ad779f4c1b7fb02d9 SHA-1: ade130af2543f97077bdd097a6d7b8b3e8c926a5 SHA-256: 4a5fd0abff111bb5e492c709747434c1fee4f49aa0a5c23e6e85d86f1465ebb4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to 'Oracle hyperion user guide', indicating a potential phishing pretext to drive users to malicious sites like 'baarspo.ru' or 'sberpodarok2020.online'. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=oracle+hyperion+user+guide PDF link annotation
    • http://sberpodarok2020.online/fejegevegimanasenijeovvzn.pdfIn PDF document text
    • http://orbitan.fun/what_is_the_second_declaration_of_independencenyi3i.pdfIn PDF document text
    • http://50offstore.info/clasificacion_de_funciones_trascendentaleskw0n7.pdfIn PDF document text
    • https://togurugake.weebly.com/uploads/1/3/1/4/131412858/gujezow.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/death_note_movie_l_change_the_world.pdfIn PDF document text
    • http://wepijafiguwenan.mywebcommunity.org/63284208554.pdfIn PDF document text
    • http://xelasurugopu.mywebcommunity.org/zebupagiwawesibi.pdfIn PDF document text
    • http://kawlites.online/google_search_history_delete_kaise_kare7kmb3.pdfIn PDF document text
    • http://iglivesupportteam.com/dunkin_donuts_new_breakfast_bowls_nutrition_informationaowh3.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/99406811887.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/millionaire_next_door_audiobook_free.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/gulusurowugelen.pdfIn PDF document text
    • http://soul-felt.com/vinegazopemorxul5.pdfIn PDF document text
    • http://antileqphh.site/33410235947m3t17.pdfIn PDF document text
    • http://lovemecompletely.com/tags_for_likes_and_followers_instagram69jai.pdfIn PDF document text
    • http://reduslimitaly.website/9979653048i4zgi.pdfIn PDF document text
    • http://antonioit.space/wuduroxesivoletuketusizrfo00.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12fb69d9-cb07-4dae-a54f-d33a9fe7972f/desuxofaref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa257d3-9bd2-48d9-8b4d-506be682019c/nepagififadizuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f288edf2-f0e8-4f28-8ebd-ca5a5216b362/romeo_and_juliet_act_1_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886aeb9f-c463-4ca8-90aa-fbd862979535/triton_atm_machines_for_sale.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_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 5464 bytes
SHA-256: 121d2d5e35c0845807f80416daf146a352effcaab57536a7a09a36040cf514d7
font_01_sfnt_off00010cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD0 10744 bytes
SHA-256: 7d5fd28474a69b39a43ba74a816b9501c14f2d758a9d88a0b0df4765666e972d

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