Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60cf1051a50d6b6…

MALICIOUS

PDF

80.9 KB Created: 2021-04-25 01:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b396073842fddcb611c6a0b879d12492 SHA-1: cae65cf92db111ad94097068ee5b651aa9068255 SHA-256: a60cf1051a50d6b6d247d1336c7ef4440cce8012d3ac63109740024ceb33f18d
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://botokaw.ru/strik?utm_term=what+does+split+second+mean+in+magic+the+gathering PDF link annotation
    • http://giwapozolaleg.mypressonline.com/donudonutezizojow.pdfIn PDF document text
    • http://jetaxopavajuluw.22web.org/6380029441.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/32107771340.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/whats_the_difference_between_sacred_and_profane.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/72861547111.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/62230db8-434d-4519-9e97-f7b99504c6ac/joviloz.pdfIn PDF document text
    • http://makuwuwamev.rf.gd/armand_maulana_sebelah_mata.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb12b77-b3ba-430c-81ef-7b9883dd093e/what_does_lsc_stand_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9048053e-23aa-44b7-bca5-dba3fe1686e0/things_about_police_brutality.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72fea72c-c100-4ac4-8ced-9c944edf8827/74019302437.pdfIn PDF document text
    • http://jigosip.epizy.com/metal_cutting_and_machine_tools_lecture_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f641af-1199-49cf-a66f-df3b0feacf47/10021089911.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/44028935378.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/bojamifafokisu.pdfIn PDF document text
    • http://lidufaz.epizy.com/15048001797.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/jitaret.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5ef14d-71d3-4592-bc53-5ae38f51e642/why_does_my_holmes_heater_shut_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/716f65d7-ceea-4d3f-ab5e-5998a39a9617/2008_jeep_grand_cherokee_laredo_headlight_bulb_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3d6d07-4532-422e-af20-6458c16ad1ea/jorojed.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_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 5500 bytes
SHA-256: caeb4bbcf30564443206aef52479be7adda91435c0dd701dcaca75fa82bd9a87
font_01_sfnt_off00011178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11178 10720 bytes
SHA-256: c1797490a67db56189707460df1f533735c3d1bee9a42c015ed36481a073884c

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