Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbc4e6263657d5b…

MALICIOUS

PDF

76.0 KB Created: 2021-05-06 11:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6e87605f62141accad6e04598ba64bc7 SHA-1: 1124f6fa159ac3ebce4f02b7790294faff0fd464 SHA-256: 5bbc4e6263657d5ba0238d9e20a3300da9b6ffc82c1299c201b400c649becf9b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a potential phishing lure related to financial trading. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

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://druttle.ru/strik?utm_term=how+to+trade+with+fibonacci+pivot+points PDF link annotation
    • http://muzesumulel.getenjoyment.net/carry_on_wayward_son_tab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501214/normal_602d50643d149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5fd637df5c8b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_6063b10bac0cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_60283afdf0e5c.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/bayesian_reasoning_and_machine_learning_2020.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/82970257271.pdfIn PDF document text
    • http://naturelofo.mypressonline.com/peper.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigumomibi.onlinewebshop.net/xevokudotikirajupol.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/22717583214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6638f4b3-d7ad-4289-98b6-716a7e3f22d2/livuresu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1d556b-5fb0-4427-8ed9-a51637383e7e/how_do_i_become_a_paid_guardian_ad_litem_in_sc.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_ae89bd77a4e84d8db95c0eae0e04dd55.pdf?index=trueIn PDF document text
    • http://newemepakirid.myartsonline.com/addition_and_subtraction_of_radical_expressions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b19627b-d29a-426e-9fa9-9d22fdf372af/nowidezijiwobamevoratubuz.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/diamond_aircraft_maintenance_manual.pdfIn PDF document text
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_136173a14be5436ba9d1fe79616e1b1b.pdf?index=trueIn PDF document text
    • https://2c9641c8-5874-4869-9b94-f1378e60aa6b.filesusr.com/ugd/efc1f6_c91d1d2f536a430ebad15b70c1943d2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/xizitizamiloxerob.pdfIn PDF document text
    • https://6cf80756-66c2-4d2e-b15d-ff1677cb7115.filesusr.com/ugd/2257e8_b7cef23032444ef5b1094a1879efee53.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/14145028792.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_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 5464 bytes
SHA-256: b86dac955eaf61fa547ff453ae3de01a616a1fd0a0bb64a08baffc15a1b85479
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10232 bytes
SHA-256: 274a39416a110be9fcdd98a609b6923480ee0346ff807bbc2cc02d93c836a788

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