Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2eb4428af71f3b…

MALICIOUS

PDF

74.9 KB Created: 2021-04-28 21:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 68d53adeb24db609ac18c1358cc47efd SHA-1: c9c86bfab9be239d16b2e385f366808c45b405a3 SHA-256: ca2eb4428af71f3b8e1b5d12bba5532a0e83e09b3d2c79b20332514b0ef97d14
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://pelibifir.ru/strik?utm_term=metal+gear+solid+3+ps4+store PDF link annotation
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/1374888.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/my_schlage_lock_stopped_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371265/normal_5fcbfe1c81e59.pdfIn PDF document text
    • http://smotrikino.fun/777872300829irlm.pdfIn PDF document text
    • https://newomaradil.weebly.com/uploads/1/3/5/3/135325616/bumozagobe-nomosotapo-nosubumipusaxo.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/mksap_17_infectious_disease_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388037/normal_604f5df52081a.pdfIn PDF document text
    • http://pifanaliriwabo.mygamesonline.org/testbook_monthly_current_affairs_august_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386089/normal_600640c1b2c84.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/bersa_firestorm_380_iwb_holster.pdfIn PDF document text
    • http://arbitestpark.xyz/what_is_a_letters_of_testamentaryskp10.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/manual_de_anlise_de_dados.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_605703e21a588.pdfIn PDF document text
    • https://lurefeti.weebly.com/uploads/1/3/4/6/134683691/zavorime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_1b7cf83eb7cc4feaaa0d45d242a6aa66.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/796dad9a-d4b6-4ad3-9f0f-5d58f463ef07/53870129104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04125a47-29eb-4a68-8c69-84c175d52132/features_of_nepal_constitution_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b572e5b0-2b99-40c7-90d5-adfa1814d9c9/dell_optiplex_9010_price_in_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d73c325-8633-4c7b-ac31-7e72f84838be/what_does_lowlife_mean_in_science.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_6bc606c05fc14123850bc6c70a622107.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_off0000e4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AF 5384 bytes
SHA-256: 45cb8e0bc1f271f83aff8496c35cdb9e395c0d3c4353ad0532632bf3050d7834
font_01_sfnt_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 12140 bytes
SHA-256: 61e7fe425a4d2715b0a8a597339a88a63f3a5c47ea3c27627c2b9d09684d76c0

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