Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b32d08a7373bb38…

MALICIOUS

PDF

81.9 KB Created: 2021-05-12 10:11:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 18bc74ba40c81eb9ddc1195e5e4db55f SHA-1: 6d2a0539735cf2450a28c1415e00c58eabdf00e3 SHA-256: 0b32d08a7373bb38f95a2c72e661b537a40a70e3df118dcb61162eeb90b24253
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of external URIs and the overall structure point towards a spearphishing attachment used to deliver a malicious payload.

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://ponafet.ru/strik?utm_term=glencoe+science+chemistry+matter+and+change+pdf PDF link annotation
    • https://cdn.sqhk.co/xurajalijok/PWOVEic/adventure_capitalist_guide_mars.pdfIn PDF document text
    • https://cdn.sqhk.co/fejovuwov/4icjhii/53194723666.pdfIn PDF document text
    • http://smilex.club/mr_bean_full_movie_dual_audioz40kb.pdfIn PDF document text
    • http://creditinquiry.info/74636436624f53ek.pdfIn PDF document text
    • http://mxbur.fun/sagevuzapelencp6i6.pdfIn PDF document text
    • https://cdn.sqhk.co/muwanije/qkhficu/31887428024.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokozebutiri.rf.gd/trophy_guide_assassin_s_creed_odyssey_dlc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0193f099-cdae-4606-85bf-e6e93e99a61b/what_hunting_season_is_open_now_in_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5590f2-cdfd-4cdc-bcb2-7313eff9e2f5/is_the_canon_mg3120_airprint_compatible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a582fd1-9b43-497a-ace9-005a85e7c6db/puraxejebusubugeliraxuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee841d2a-c930-4c93-817b-a3c12084ce6d/gibatamidiluvom.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/calling_location_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/bsc_full_form_in_networking.pdfIn PDF document text
    • http://labeberop.epizy.com/adductor_strain_rehabilitation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25612120-df2d-44e3-bd1c-228a5b03a941/is_swing_trading_good.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/android_remove_google_assistant_from_home_screen.pdfIn PDF document text
    • http://tibepaxun.rf.gd/physics_textbook_online.pdfIn PDF document text
    • http://fowasabitafal.epizy.com/pokemon_diamond_and_pearl_prima_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5e9a9e-01ba-43df-892c-09824eaa9e92/que_lenguaje_utiliza_el_autor_del_lazarillo_de_tormes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/128feb06-d7c2-4361-a10d-d36bc0c9e71d/rolamenonakefipiwegojivej.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_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 5704 bytes
SHA-256: 6df66b37b8ac5e4f8e54775909469518cb98a94efd092294daf1e839b4ca92f5
font_01_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 10792 bytes
SHA-256: 41fab7d177c5eb99c5d7602ab42673648d4751d5ba8428598eb54a8c947b88aa

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