Malicious PDF — malware analysis report

Static analysis result for SHA-256 5490d00e2e44de3a…

MALICIOUS

PDF

68.0 KB Created: 2021-03-22 04:40:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 07eb934021fee06aef1360165f6d4872 SHA-1: caa821bfff7c33c98526a14aa8117057d8fcafbd SHA-256: 5490d00e2e44de3acb99f6e6cc6b7510195af9c25c28e45b8d5899c2dccb0919
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure point towards an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=free+rental+inspection+report+alberta PDF link annotation
    • http://raxejudesezix.scienceontheweb.net/ms_excel_spreadsheet.pdfIn PDF document text
    • https://cdn.sqhk.co/guludagew/bwsF6BG/champion_carrom_board_price_in_pune.pdfIn PDF document text
    • http://pankreatitum.ru/41943752013gdmde.pdfIn PDF document text
    • http://b4shop.icu/354585360078xyf5.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/ojehjcC/new_english_song_video_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/jdFhaMI/t-_mobile_syncup_drive_plans.pdfIn PDF document text
    • http://ejqy.com/community_child_care_solutions_income_guidelines_2018m7jev.pdfIn PDF document text
    • http://donbetosstreettacos.com/famaduwaboku3t1j.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/juzulolapidivusoku.pdfIn PDF document text
    • https://cdn.sqhk.co/letiludixo/jcgfjec/long_scroll_website_template.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/bitesiwepetal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413117/normal_603d221929510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_60112918a1d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_60272c5bcdb7b.pdfIn PDF document text
    • http://citrus-fruit.space/iron_883_service_manualwdexl.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/warapazutonesajobirupoto.pdfIn PDF document text
    • http://xonewidenutubo.iblogger.org/17564269793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446038/normal_5fcb74db7cbc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_604d662930936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topagujowulefe.epizy.com/66760625675.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_off0000cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE6 5020 bytes
SHA-256: 5a679e5983028cf567388f37def3d02e7d2835d174da8b8c59eafbcedf16ce44
font_01_sfnt_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 10220 bytes
SHA-256: 1f082e7045dc4db94968bcd2bd34f12e9c7f11a311b21ed8e8319b057c4c003a

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