Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0b243796db680a…

MALICIOUS

PDF

73.3 KB Created: 2021-03-27 23:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4ef9c2cf00df76627d98642e0f794853 SHA-1: 4bfb40f2eb9ec3dda2109d3f18152e455e9b52df SHA-256: 8e0b243796db680ae83a117ce4d7cc93541428c85b7af26ac1e320e186e8036e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://crophysi.ru/wix?keyword=how+to+connect+wifi+on+wii+u PDF link annotation
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/a77bc4.pdfIn PDF document text
    • https://cdn.sqhk.co/sinonari/ghNurSF/dude_perfect_pound_it_noggin_tour_review.pdfIn PDF document text
    • https://cdn.sqhk.co/sujimipin/w0GifhG/bitcoin_wallet_buy_btc_download.pdfIn PDF document text
    • http://welogotodamiris.22web.org/what_happens_in_the_last_book_of_a_series_of_unfortunate_events.pdfIn PDF document text
    • https://kepubaxolawava.weebly.com/uploads/1/3/4/7/134703856/bonaludud.pdfIn PDF document text
    • http://lizotegek.iblogger.org/refrigeration_and_air_conditioning_handwritten_notes.pdfIn PDF document text
    • http://davavemoj.66ghz.com/gisakedavom.pdfIn PDF document text
    • http://bezufasenifeni.22web.org/paleontology_lecture_notes.pdfIn PDF document text
    • http://rizuxikasosokeg.22web.org/pixezigowibabidujifanali.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/mubuzeguwu.pdfIn PDF document text
    • https://geredape.weebly.com/uploads/1/3/4/3/134349068/mexubajomexop.pdfIn PDF document text
    • https://cdn.sqhk.co/wajidafix/icjeria/jufamig.pdfIn PDF document text
    • http://ginumon.iblogger.org/minecraft_cracked_shiginima.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/dfe7a55c-ae33-4851-b35e-a100d739844f/bikeru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c8df85-d9b5-4c27-b88c-ab516af3dc96/best_agatha_christie_books_poirot.pdfIn PDF document text
    • http://filexumif.epizy.com/zepafunupenovarile.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/64040930259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1313ac5-8939-477e-83ec-14c4641d0140/lanajekebuzewolodix.pdfIn PDF document text
    • http://gofudawaropuz.epizy.com/jofumaxavegu.pdfIn PDF document text
    • http://jefebewo.epizy.com/healing_back_pain_john_sarno.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/tibevevawugaxizikulomide.pdfIn PDF document text
    • http://dogurof.epizy.com/bowknot_platform_flat_sandals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1f61d8d-3850-4faa-b38b-fb9fc7f4e765/kenmore_elite_he5_gas_dryer_troubleshooting.pdfIn PDF document text
    • http://puriruf.epizy.com/atmosfera_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb09fb3b-8379-43d8-a081-033524593df1/soleus_air_95_pint_dehumidifier_manual.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_off0000e309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE309 4412 bytes
SHA-256: 3fc7fb67689728452d493c3a1ee29123ed0768148ae7992756f86a324cd7031c
font_01_sfnt_off0000f235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF235 10460 bytes
SHA-256: 683536ff7d7a03f3f372cd89d6be5e8d31537038e15f1fcbc9dfbf37a3b804bd