Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cfd7b275cde2a6…

MALICIOUS

PDF

82.1 KB Created: 2021-03-21 05:23:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b66c1dc35f8f33e2221c157b153526f SHA-1: e59830db2ed637f0c5cc7f1daf586f42c85d3f73 SHA-256: d5cfd7b275cde2a6eb59c83069b00cc979bb7823188f94a6bef5acd839c77fee
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable domains or link farms, indicating a strong intent to redirect users to potentially harmful sites. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/strik?utm_term=2000+honda+accord+v6+transmission+replacement PDF link annotation
    • http://jesibijifinuz.mywebcommunity.org/asepsia_y_antisepsia.pdfIn PDF document text
    • https://cdn.sqhk.co/kumotuxijufu/dhdUjiK/96426033222.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/how_to_get_10k_followers_on_instagram_2019ywkub.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/gf5ifhb/5994056782.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/9815721428.pdfIn PDF document text
    • http://sfhgfje5df.xyz/whats_in_a_name_activity_sheetrdl23.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/rL2Zyic/download_bubble_shooter_3_mod_apk.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/doremilitevukujure.pdfIn PDF document text
    • http://albl.ru/american_ways_of_lifez5ac1.pdfIn PDF document text
    • http://leree6.club/basketball_training_workoutsxmtgw.pdfIn PDF document text
    • http://complerbnp.com/how_many_countries_on_equator4k67b.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/48211829210.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_968992b8be034b61ba8d6f3adfdfe5bc.pdf?index=trueIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_59f4bf01c9c142b399753d4b346a5b63.pdf?index=trueIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_045fdec553ff4f96a86b95922d24571d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bd347f-d12a-4abb-82ea-897434d8ec3f/luxosaferav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b666835-3761-4c38-9f24-3c0c89b3397b/tp-link_tl-wr841n_admin_password.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/papebiduniju.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/50012590611.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/9887449514.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_62551d924a6c4d369733ec16476d5f11.pdf?index=trueIn PDF document text
    • https://8c77b9b7-c39b-43d6-9406-6086bd2c0f93.filesusr.com/ugd/ee6770_aa8136ec96b64dc5a6d2dc1e0c2b5b2b.pdf?index=trueIn 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_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 5708 bytes
SHA-256: a768bb76a3383f37ef73599ee388b21c850885985b30e8cc680be6953957663a
font_01_sfnt_off000114ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CA 11200 bytes
SHA-256: 4fde8f1ef9ec2eca0f8b26668202b0d9b9ab191c68b35020d6d85169acd46865

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