Malicious PDF — malware analysis report

Static analysis result for SHA-256 616f5619a3e6afe8…

MALICIOUS

PDF

79.2 KB Created: 2021-03-19 14:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69aad2f7cd669e9b6a4c0d45f5d14915 SHA-1: 30f0bbdb94792555aaae5b06ec5c62e62e26b3c3 SHA-256: 616f5619a3e6afe82b1fca075e5f139266171567f4fba803f4e6fb7fbf27ee94
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 0.9998

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://druttle.ru/strik?utm_term=literal+equations+calculator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fd0711048633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_600e502d1c7b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368224/normal_5fcda9d5c83a7.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/mEQhdYw/applocker_group_policy_not_applying.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_604a03804c893.pdfIn PDF document text
    • http://gazzsheff.xyz/doxaminojoxexegibepegewig17z3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384310/normal_6017e02b9149f.pdfIn PDF document text
    • http://euroshopme.site/78728235502ay5py.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5ffbeadf84783.pdfIn PDF document text
    • http://instapriz365.online/how_to_fix_e2_error_on_trane_thermostatqk2kf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_602be5d4421be.pdfIn PDF document text
    • https://cdn.sqhk.co/jadidawa/gchhpnx/44258889021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383156/normal_604b37a42f175.pdfIn PDF document text
    • http://trelon.fun/napowofuwotoramijazejujoxbqm44.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/0554a33b-a1e6-4606-9cc5-f53007b0d0ae/cortisone_shot_acne_midtown_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a21ac5-e43c-4103-81ed-b3f3335c232c/way_of_the_world_summary_in_tamil.pdfIn PDF document text
    • http://duzijomitopaxa.epizy.com/antilog_table_book.pdfIn PDF document text
    • http://bajofot.epizy.com/tilodop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fd8fae-00e3-4d6a-8049-9f53891429ad/najab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 4180 bytes
SHA-256: 118f35bd3909c675219a988e1f1956c0287b3c7d616182279934421cee250e12
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 4860 bytes
SHA-256: 7228780c460fca8e2704736cba4ca616177dcff869bc1efd06940641c3f45593
font_02_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 10556 bytes
SHA-256: 21a6f6792ef8feec87dcee40333af66e938f2028855a454b7c7eeb10e50936e3

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