Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f39fee9e23e112…

MALICIOUS

PDF

99.5 KB Created: 2021-03-24 02:33:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bab6cd9c0e7f4d87b817beb01709daa3 SHA-1: 588336e0819c512ccb2725dc79e759b7af50aa66 SHA-256: 97f39fee9e23e11206445859c0c17764b90ba9b5d0f1fb2e501ae17442a5eea5
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 0.9992

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://ponafet.ru/award?keyword=hannah+arendt+the+banality+of+evil+pdf PDF link annotation
    • http://segwaywheelchair.ru/heavier_than_heaven_reviewtq9tw.pdfIn PDF document text
    • http://shishkin-seed.xyz/lactic_acid_bacteria_fermentationiel7a.pdfIn PDF document text
    • http://1s.london/baking_sheet_chicken_and_vegetables2mknr.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/2490554.pdfIn PDF document text
    • http://websporizle4.com/tennessee_titans_schedule_20200tvg4.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/21512370885.pdfIn PDF document text
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/vozazanunugip-sajorezel-ponosopi-faxebu.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/how_to_clean_the_dyson_big_ball.pdfIn PDF document text
    • http://rimarilomikozu.medianewsonline.com/85648538761.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/cual_es_la_importancia_de_las_reacciones_de_combustion_en_la_vida_cotidiana5khps.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/abc72e3f-3b8d-4e80-806e-0e2a59085829/program_logic_control_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38290dd-a954-493a-b91c-4cb140661000/tezosadepakovazerelovasu.pdfIn PDF document text
    • http://giduzorim.epizy.com/70370310606.pdfIn PDF document text
    • https://73b3f487-90f5-41a6-bf44-750372f72efd.filesusr.com/ugd/39e8d0_a6dda42f8d7c4475889b476967c52adb.pdf?index=trueIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_8f7425052afd47a9b05802bca1e3cfc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4091dc67-082c-4bb3-96b0-a2fb8c08e971/75456303697.pdfIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_fd9d1d0431b442be9044b579fdbc5594.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_782d03d6f6df42a7a26628a054a5adf4.pdf?index=trueIn PDF document text
    • http://wareguw.atwebpages.com/gezira.pdfIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_d8398a837b2e4e309f23616dc7b87770.pdf?index=trueIn PDF document text
    • http://biwedudomobi.epizy.com/52443008472.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da43cf9b-7846-49a2-9e93-e0a16d80f252/la_casa_de_bernarda_alba_chapter_summaries.pdfIn PDF document text
    • http://mitefarosut.rf.gd/sisewudatonozodiz.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/32625003276.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_off00014816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14816 5216 bytes
SHA-256: 97df6b86a21687b6b2a282012c6f50415174f1ac10ebf8afe054e34b325780e3
font_01_sfnt_off000159d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D0 11812 bytes
SHA-256: 226eb18d39f76b81defb3f9333a870f5f5f3f8f5c758d48533d01a9a4d5fe1dd

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