Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a06a2a648acaa1…

MALICIOUS

PDF

148.9 KB Created: 2021-03-19 23:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f40f92860b4bced025b645cb7f4ada2f SHA-1: d5cebe0c08841a802d2cc816b6edf653b9685351 SHA-256: c5a06a2a648acaa1eee171b80fc25169296a24fb7603cacab0e55150cefb3dd5
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://baarspo.ru/wix?keyword=mapa+politico+de+puerto+rico+con+sus+pueblos PDF link annotation
    • http://austritkfa.com/59551103418okpbd.pdfIn PDF document text
    • http://thechambre.xyz/how_to_connect_soundpeats_bluetooth_earbuds3l3nm.pdfIn PDF document text
    • http://websporizle4.com/30327183047cie7p.pdfIn PDF document text
    • http://birjand.design/dreamsky_auto_time_set_alarm_clock_manual6d68e.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/a77b4b2e3b.pdfIn PDF document text
    • https://ronafipilegov.weebly.com/uploads/1/3/2/6/132681204/6651300.pdfIn PDF document text
    • http://forkidsshop.online/lasonifoximufavamutevoduftl52w.pdfIn PDF document text
    • http://bahis-sikayet.com/writing_conventions_list3q14b.pdfIn PDF document text
    • http://erse.xyz/996409275743lz7w.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/82e55b9e-cc35-44ba-8a09-fa7304ad6ac7/pretties_scott_westerfeld_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26298924-0ad9-450a-bff2-6439a0ec24a2/24066407176.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d15d2fba-a450-41c0-96a6-802725ed8f03/harlem_by_langston_hughes_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a06163-dba1-44d0-bf6b-965a9abc8e29/baby_gap_girl_pyjamas.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_71c2057e86924c7d917f230d4c30e280.pdf?index=trueIn PDF document text
    • https://ca6b24e6-01cd-4368-a310-1df05077a315.filesusr.com/ugd/11b39a_01769a01a77f4800af6c211acedea629.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8ec2f5-e12a-42f1-bca1-d1b2f9c7e899/art_models_10_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d01cf3a-c8e2-49e8-92f2-abcb5df2e1b1/22771276548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de911ef-a57d-43ba-bbd9-839c48118cb0/what_lenses_work_with_nikon_z50.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_44bec59789d0450a834afd8877c55d59.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_off000205cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205CD 5212 bytes
SHA-256: 4cee3488c589c0300508bb0bde9cefd1e917451c7c85e524aaec92b74720c780
font_01_sfnt_off00021793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21793 13964 bytes
SHA-256: 57bb432359eb47864e4efb7db23600097b1dbc8a85d2391fd29357331ffeb658

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