Malicious PDF — malware analysis report

Static analysis result for SHA-256 5657bbd864dc0c30…

MALICIOUS

PDF

76.5 KB Created: 2021-03-27 23:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 925feaca32c0019bd5aa01da802e038b SHA-1: 9dfc03b7fd5f239beb45cd6c9740b1be0e414ab1 SHA-256: 5657bbd864dc0c30bb5eecd23efcea16ea817695bd6479c9ab05396b4fb6729a
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 0.9991

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://jumiwimov.ru/strik?utm_term=where+is+the+filter+located+on+my+keurig PDF link annotation
    • http://fopokigife.mywebcommunity.org/carte_du_monde_capitale.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/ieZjdiE/wutivivideguju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fd79f34efed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_6044a72910ded.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/PUWjiif/mediamonkey_skins_installieren.pdfIn PDF document text
    • https://cdn.sqhk.co/vopunokapire/ih2giih/feludasononesitolus.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/jvdjepc/tomafedorobabekivefusomu.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/7b53e501-2fb4-4fdf-8248-59a8fe02eec3/dixaxabozitokupasikazuwo.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_97cd67571cf3427d955ce83eb26b75a8.pdf?index=trueIn PDF document text
    • http://fidikaxano.myartsonline.com/nunademukawelixaxupe.pdfIn PDF document text
    • http://laxuzoto.onlinewebshop.net/nom_aditivos_alimentarios.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_78ee88b01103405f8dd911a782b42b69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/ishikawa_diagram.pdfIn PDF document text
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_8fb951e7d8e7499abca4c9209a19da00.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a623fd86-259a-4d23-be2b-a154d70fc731/what_is_the_best_cobalt_drill_bit.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_e649170c916d436ea44045069ada08be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/avengers_2_full_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/rojov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7878e434-4a7b-4a78-be0f-648859f626e8/the_filmmakers_handbook_fifth_edition.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/fawisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7ce7c4-aa29-4e84-a907-abef7e12fc30/61367724475.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_92cbead5ed014a49bbdc84ba79d851d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/bdo_mobile_apk_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b591af-bde9-4466-b4ca-98679098c346/sapesovowo.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_off0000ebb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB8 5616 bytes
SHA-256: 7b6a142a8b8e2f6d8362255ef245fc6fa67e3f63bdfdcbd686d5869d0317efc2
font_01_sfnt_off0000febc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBC 10428 bytes
SHA-256: 209a3de9193107de011ca9e16aa2c7308739e0e7e692c683783ff7b5ac4e065f