Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b49f5c31aea197d…

MALICIOUS

PDF

69.3 KB Created: 2021-03-24 13:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e81badd745f22f2aec92034c3465b0b9 SHA-1: d769041fb37025d8497d3e141ec70aa3cb12957d SHA-256: 1b49f5c31aea197d8aa7eca3b432f02e94d5a3e99d2e86887278626697c4ce83
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://golowaki.ru/wix?keyword=dry+september+characters PDF link annotation
    • http://libotopatolar.iblogger.org/endeavour_scholarship_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/gjRsNPS/liviraxotolun.pdfIn PDF document text
    • http://lolabarafusiru.iblogger.org/girlboss_netflix_real_story.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/9gh4cE6/super_mechs_kizi.pdfIn PDF document text
    • https://cdn.sqhk.co/fikalibumi/ibhc8jf/bucket_filler_coloring_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/tazofexoz/jjghDja/xitikepifuvekutovokituzo.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/d0f6108d-3027-41fe-a472-81a03aa0532e/vopavotisemeriwofat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcf815f-b051-45ac-b209-6f0d766229fc/24727907440.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/gefomosunuwug.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/onn_bluetooth_earpiece_manual.pdfIn PDF document text
    • http://nepogewapiw.epizy.com/bupanesibijajibadebimuli.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/97933836306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20d983c-2914-479e-8e03-9aed8426164f/likekilozimeka.pdfIn PDF document text
    • http://befokube.rf.gd/how_to_deal_with_daily_life_stress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeeb0498-4d81-478d-a73d-e13c78f04646/81261439625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daae1298-5e1d-4f5f-b1c1-4b9d75299af2/how_to_remove_pimples_and_blackheads_at_home.pdfIn PDF document text
    • http://nimobavaze.epizy.com/51222804911.pdfIn PDF document text
    • http://fevurilaj.epizy.com/30316813201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75b6e377-75fd-4845-9bb2-7f777f61c20c/how_much_does_an_ipod_mini_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/cma_cgm_mumbai_accident_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/455b9202-39be-49bf-8da8-ad0b2a94c551/adobe_premiere_pro_cc_download_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/tefijuzevugukulezoja.pdfIn PDF document text
    • http://gugujis.epizy.com/59922952869.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/bovolukipifovadefogodi.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_off0000d39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD39B 5380 bytes
SHA-256: 6280776f9a9081f4939fa1c95228a48e804310a9d8255e255b91e8c33e4f9678
font_01_sfnt_off0000e5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CA 10272 bytes
SHA-256: 0974a56179f86c9a1c6adde3c127565185deb77898ff2212960a149af1b916e4

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