Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f550994f653763d…

MALICIOUS

PDF

81.6 KB Created: 2021-03-14 18:26:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16b41520e64ae9c358773285ca3fda10 SHA-1: 14db55bd8de5aeec1d1ed38f759f04c019b6a2d5 SHA-256: 1f550994f653763d54c507b7fed92692a0a06ffe1f8deaaeb40489e97f7049c1
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://xajibur.ru/123?utm_term=abstract+reasoning+test+4+answers PDF link annotation
    • http://jidojagijubu.iblogger.org/gegiwegotero.pdfIn PDF document text
    • http://nature-ital.space/sifubovuw2ej8.pdfIn PDF document text
    • http://maewallace.com/la_noire_switch_walkthroughx7o8o.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/zuzalizilosatubisutete.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/nuwujikoluturetuko.pdfIn PDF document text
    • http://trylait.club/kumogemiroja33fhe.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/bluetooth_4._0_specification.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_5ff083246d25d.pdfIn PDF document text
    • http://simkosa.website/rekubaneresawm9dr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fd14d4ab86e9.pdfIn PDF document text
    • http://opssmall.space/best_electric_ice_cream_maker_2019oc5eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusebirenox.myartsonline.com/research_methodology_in_psychology_books.pdfIn PDF document text
    • http://vawujularow.rf.gd/68067222039.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/4_divided_by_0_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/edema_cerebral_sintomas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1703b5a9-ab34-4900-b1fa-ed32d1bd9b15/sat_practice_questions_math.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/vsco_cam_filters_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f083770-667c-4832-bf30-d331fdd09df2/yamaha_timberwolf_250_gear_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f0a91d3-5e27-4874-a615-39ba91ca17ff/temilikebajujozofawix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbb5574-828e-4793-81ca-22ad4e2b88c2/quran_english_version_free_download.pdfIn PDF document text
    • http://lusalelafujijo.epizy.com/campus_ampasayya_full_movie_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0f3422-c1a1-4f64-b2f8-4c473e507718/jogizokazufijusukixinejug.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/twas_the_night_before_christmas_classic_book.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_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 5244 bytes
SHA-256: e6df76fc25512536a09fc19bec982c7487594919b5e3565848c6c4ff33c6efd5
font_01_sfnt_off000114a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A6 10512 bytes
SHA-256: 02603a6f3be606bac0c15e41821af1db041d71bbb843a6d5efcbfcc29fc60f87

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