Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65f973b51c5bdc9…

MALICIOUS

PDF

94.0 KB Created: 2021-04-02 00:00:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 089568a025f00109992884f5b5401a65 SHA-1: e4951aafd24e1dfc4813a0a74c0fbc2414552cb7 SHA-256: e65f973b51c5bdc9bbd4be5b10f34b35adca9024e7ecb70b6f1bdcb021223caa
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, and impersonates the Facebook brand to lure users to click a link. The primary malicious URL identified is https://maypoin.ru/award?keyword=today+current+affairs+in+english+pdf+download, which likely serves as a phishing page or a download redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://maypoin.ru/award?keyword=today+current+affairs+in+english+pdf+download.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=today+current+affairs+in+english+pdf+download PDF link annotation
    • https://cdn.sqhk.co/wovegorarev/9ijicsg/57146760037.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/jWSGje8/minnesota_vikings_win_loss_record_by_year.pdfIn PDF document text
    • http://poradoit2.site/binomische_formeln_ausmultiplizieren_bungen3zods.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374368/normal_5fc611b14fffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_60486bd21cee8.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/fhiifdk/best_alchemy_game_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zetikitor/0jiiiLY/nigerian_praise_and_worship_songs_list_and_lyrics.pdfIn PDF document text
    • http://accueilcmb.com/19398685920f95c2.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/iiIie3U/motogp_race_results_austria.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/gijcKhj/livotoker.pdfIn PDF document text
    • http://letekidela.iblogger.org/video_er_hd_quality.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478703/normal_6041b9f2a8776.pdfIn PDF document text
    • http://gutufozif.iblogger.org/99848073121.pdfIn PDF document text
    • https://cdn.sqhk.co/wejagamewo/bggNhjg/furijikolexi.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugewameru/YUs7vhh/jeopardy_playshow_microphone_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5ffb991871fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_6019d3fc1bd2a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiliwajomagob.rf.gd/17086753188.pdfIn PDF document text
    • http://xalesikejuxo.epizy.com/91455725179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98769ca-8768-4bc0-a4cb-237f67578c6c/78892081176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6b305e-6ec0-4d00-8b19-d6484cee9e1d/what_is_echo_tapping_for_weight_loss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9098a2fd-8b77-4ec0-947c-87f8523d0c42/the_real_book_jazz_bass_clef.pdfIn PDF document text
    • http://xedonufil.rf.gd/61879410942.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_off00012e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0F 5560 bytes
SHA-256: 5897724191577174992607540758ca393a9c5a426f5f637c1a8e15be7d655026
font_01_sfnt_off0001410e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410E 11536 bytes
SHA-256: 3c9f8321faa5562008614d48de63537e715b519a7ddd532f12f2988885ef7f55