Malicious PDF — malware analysis report

Static analysis result for SHA-256 47257256649d79d3…

MALICIOUS

PDF

73.8 KB Created: 2021-03-17 05:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b74eb569bea8d116908e15523ddc7884 SHA-1: 9bfc9f04c295259eac00ac879f8bf8502f51ea58 SHA-256: 47257256649d79d33172e45e435c2020a673d405289f43e5a383056d5ee37faf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://jacksth.ru/123?utm_term=ppsc+challan+form+sub+inspector PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489733/normal_6046d29f433e2.pdfIn PDF document text
    • http://tibudirowe.mygamesonline.org/ciaphas_cain_emperor_s_finest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376878/normal_5fca188108507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vijanemafe.rf.gd/simile_and_metaphor_activities.pdfIn PDF document text
    • http://wutumaxade.epizy.com/sat_subject_test_book.pdfIn PDF document text
    • http://letupekego.rf.gd/gagenetosoludo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad62688-78c7-40de-b275-fb6837046785/oracle_database_download_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/blood_bowl_2_nurgle_team_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c47f42-d90b-4b47-8ae1-569f71f4a54f/viwurawovasivejoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/jobs_related_to_social_media_marketing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f680c6-8851-46de-9dbd-d2bb09972332/sogopatojuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32706190-0008-41b1-a166-17a6c2ff845a/air_force_1_pixel_white_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b669d5db-2390-46f2-b3ce-5c35c13719a1/40161655415.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/chirutha_movie_video_songs_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4bc3f4-6b99-4a50-8aed-051dca1a915a/21463706439.pdfIn PDF document text
    • http://nalirabagetovop.epizy.com/honda_ruckus_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/jerixemirazukak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/917594af-99a2-4275-9250-36501d44eb3c/how_to_simplify_ratios_into_fractions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709e5c09-441c-4744-bc8b-c2be32a6e552/74127128524.pdfIn PDF document text
    • http://tugojolowok.epizy.com/insurance_claim_form_template.pdfIn PDF document text
    • http://kewetanetoza.atwebpages.com/38562913663.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_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 5396 bytes
SHA-256: 8cf61d7b6c5b2cf7c630070739c85bb44bf9cac95d4e455503c2a48920d6a43c
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 10784 bytes
SHA-256: 77f7cd7b38dc06b58a201e8ed7d6e94af33e3bba43bc96abbaf4c354c847f684

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