Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d03d291c881e57…

MALICIOUS

PDF

77.0 KB Created: 2021-03-06 10:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 55566e5f6bad24bac1154a5e64348513 SHA-1: 5f48d9b8daf940c3d207cfeeebee643f246070b5 SHA-256: 78d03d291c881e576cb05cec72230d82614ab92cbd7521b7810a3882837050aa
166 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ClamAV and ML classifiers, with high-severity heuristics indicating suspicious and disposable link farms. The document body, though obfuscated, suggests a lure related to a 'Sony alpha 77 ii user manual', which is likely a pretext to direct users to malicious domains. The embedded URLs, such as http://securityofusersdevicesonline.site/aircraft_ramp_operations_manualp2vm5.pdf, are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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/wb?keyword=sony%20alpha%2077%20ii%20user%20manual PDF link annotation
    • http://securityofusersdevicesonline.site/aircraft_ramp_operations_manualp2vm5.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/what_date_did_school_start_in_2017.pdfIn PDF document text
    • http://iuts.space/22683146062kxeof.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/tezutofopasenezatatovu.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/summer_baby_monitor_camera_sync.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/what_are_two_raw_materials_needed_for_cellular_respiration.pdfIn PDF document text
    • http://wikowezenitezo.medianewsonline.com/how_much_does_respite_foster_care_pay_texas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b1706aec-e9b1-4c6c-9a93-f14ef4a1c402.filesusr.com/ugd/3b47cb_d2c0fb216dfb47f68e816a1485a370e3.pdf?index=trueIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_684f4cab206544c9a99956f7a4368a0f.pdf?index=trueIn PDF document text
    • http://jabejanaboz.atwebpages.com/mifulebiwaw.pdfIn PDF document text
    • https://91506351-5699-48ce-85e7-8e7d071f4e87.filesusr.com/ugd/d775a9_067423a235b545b093686a1dc7f2ba61.pdf?index=trueIn PDF document text
    • http://jedasejikiboj.epizy.com/putigodogujoraxifozu.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_213329e6b45d45bab66dd325712aa372.pdf?index=trueIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_c783982fad71461fa593e90694614098.pdf?index=trueIn PDF document text
    • http://roxigivakupumun.epizy.com/27765330007.pdfIn PDF document text
    • http://pigutun.myartsonline.com/26772003337.pdfIn PDF document text
    • http://pezefaxovojole.atwebpages.com/nekotesebamarunebefu.pdfIn PDF document text
    • http://mutifesojare.epizy.com/camscanner_for_pc_windows.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_off0000f010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF010 5344 bytes
SHA-256: 0ac484b32165d8f89b9cf3f35c8cc0ba29f3f49a48580a8f0b6ca612b8cd665f
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10892 bytes
SHA-256: 03389bb611cc9ce88926ace92ad92190a4c2a6d9a9b0cda6cef730cfd3563ab3

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