Malicious PDF — malware analysis report

Static analysis result for SHA-256 4855596b24d1d91d…

MALICIOUS

PDF

72.6 KB Created: 2021-04-05 19:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d50a537771dbc5f7bc7fe5649c97fe9a SHA-1: 59cbf883e21f98fcb7f6be2520fa41da93956095 SHA-256: 4855596b24d1d91d05a641cce8c782e6d0e889c6ad48ed7966178b83c77bf8d0
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://soxebez.ru/award?keyword=ancient+greece+olympics+worksheet+pdf PDF link annotation
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/tokaneludokaj.pdfIn PDF document text
    • https://fevupadijedip.weebly.com/uploads/1/3/1/4/131407665/gitevoseroli.pdfIn PDF document text
    • https://kurasapar.weebly.com/uploads/1/3/4/9/134902571/jorugigug.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/hBhcjjO/rebag_reviews_trustpilot.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/ibEiaJi/mod_herobrine_minecraft_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/ihhgicU/xixekivezu.pdfIn PDF document text
    • https://boxemafal.weebly.com/uploads/1/3/3/9/133997404/zevatopotusodo.pdfIn PDF document text
    • https://cdn.sqhk.co/lajagika/nShfgiS/the_verve_slide_away_lyrics_meaning.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wijetifosoxi.epizy.com/motu_patlu_cartoon_game.pdfIn PDF document text
    • http://sogoxeme.rf.gd/autocad_underlay_not_plotting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ccd53a-e23c-427a-8fe9-2d5964b5f60f/winters_bone_movie_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/593d2f77-d591-4a57-9173-87fda2530be9/gegefuwiroxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/734dc134-6168-4dda-bceb-267c8fb20984/tables_of_normalized_associated_legendre_polynomials.pdfIn PDF document text
    • http://vuvuvemalazot.epizy.com/rowone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d22c61-d7ca-46ae-b13d-0c0cc53b8433/kenomajunapawixorejiwedo.pdfIn PDF document text
    • https://4f7f339c-9ee9-4921-a7ad-794169edd555.filesusr.com/ugd/fea72b_408f5fe237774128abaa0870895d64ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2f19a5-47b4-48aa-a383-73d58745f0fd/widopafaguborukiw.pdfIn PDF document text
    • https://80b1f93a-fe74-4439-a81d-34814fa7a505.filesusr.com/ugd/e56fe2_c0f66bdd31e44e79bdef543161005d08.pdf?index=trueIn PDF document text
    • http://kiwusumusi.rf.gd/icc_es_report_eifs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3AF 5392 bytes
SHA-256: 8f0eb674e7cecdf6ee711becdfda5c73c6cc688dafac01b641e1bd57b14eb76a
font_01_sfnt_off0000e5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E9 9688 bytes
SHA-256: 603f8c7c2d96aac7cdb1451e603cafb6fd5a010b60e2d4c70a6d469c65acd255
font_02_sfnt_off00010718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10718 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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