Malicious PDF — malware analysis report

Static analysis result for SHA-256 00580608ffcae1fd…

MALICIOUS

PDF

82.6 KB Created: 2021-03-19 22:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a2178a957a7000c3c343dc6a84b02823 SHA-1: 5850d47e07867b5269813250270bf0ace843914e SHA-256: 00580608ffcae1fdd08679dda4401446fe070493f075ae0bb881d910c23db9ec
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirector infrastructure, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a link to 'yafferge.ru' which is associated with malicious redirector activity. While no scripts were extracted, the structure and embedded links strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=loudoun+county+substitute+teacher+jobs In PDF document text
    • https://cdn.sqhk.co/muribirigim/3bjagft/30808834907.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/Pt6ggia/podcast_good_news_good_night.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/yaskawa_a1000_manual_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zobarimumuje/gdbhcgf/kiganobovodozusevagelirot.pdfIn PDF document text
    • http://rokuboxajiga.medianewsonline.com/wazodani.pdfIn PDF document text
    • http://sitajejo.22web.org/semikavuwozozunusogod.pdfIn PDF document text
    • https://cdn.sqhk.co/tokofape/wruQgjU/21201022823.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/nikagij.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/VuNFBjf/3549096046.pdfIn PDF document text
    • https://cdn.sqhk.co/xawuboma/5engdRv/59712226494.pdfIn PDF document text
    • http://wulutapebime.getenjoyment.net/bahishti_zewar_urdu_online_reading.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/DQRgjf8/dbz_battle_of_gods_game_character.pdfIn PDF document text
    • https://cdn.sqhk.co/fezajuwu/hfqjajc/raft_island_wa_bridge.pdfIn PDF document text
    • http://bapadama.medianewsonline.com/computer_programming_books_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fimirexuf/j2ieVhj/double_color_wardrobe_design_furniture_bedroom.pdfIn PDF document text
    • https://cdn.sqhk.co/norifasil/Pbwjbgd/8692179710.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/ijJxbgj/36520951978.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/vjgjgjF/rudeliwax.pdfIn PDF document text
    • https://cdn.sqhk.co/sogunixe/jOjiijL/drum_kits_fl_studio.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/w7heibm/chicken_drumstick_soup_thermomix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapowuxivi.atwebpages.com/old_mans_war_book_series.pdfIn PDF document text
    • http://tapagekitozu.rf.gd/poxotuleporevezuleveredu.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/favizajapuvojujifudi.pdfIn PDF document text
    • http://gexefojimikig.epizy.com/capability_maturity_model.pdfIn PDF document text
    • http://mogixos.atwebpages.com/ars_poetica_analysis.pdfIn PDF document text
    • http://buzawasilugije.epizy.com/doxepin_medication_guide.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/la_metamorfosis_de_una_madre_libro_gratis.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_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 5252 bytes
SHA-256: 49d1be0571e0a0c14b51fb2f4b48c555ba30e7a5882a10d8865bb646d36fb2ca
font_01_sfnt_off00011664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 11148 bytes
SHA-256: 5f6100751816ff1de5675e54c9bba20c59d4e521db822c29100bd1473292673b