Malicious PDF — malware analysis report

Static analysis result for SHA-256 95aab429d5f753a1…

MALICIOUS

PDF

79.7 KB Created: 2021-03-09 13:14:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 8d29381a11b69d6bb5c7a0b00fb8f7e0 SHA-1: 624d64a0bba9f9d5ca8026eab6ef2082ef401c15 SHA-256: 95aab429d5f753a14fd1d1587469ce14b4126b5887e0355ba5ee8874972a3525
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL pointing to a search query for 'essentials of comparative politics 6th edition pdf free download'. The presence of multiple links on disposable hosting suggests an attempt to manipulate search engine results or distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=essentials+of+comparative+politics+6th+edition+pdf+free+download PDF link annotation
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/xalimudidizigi-dufuw-kiderabupuxete.pdfIn PDF document text
    • https://wavafawiwex.weebly.com/uploads/1/3/2/8/132815000/8906620.pdfIn PDF document text
    • http://zodatowafe.getenjoyment.net/jatimukut.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/momux.pdfIn PDF document text
    • https://kexekogu.weebly.com/uploads/1/3/1/3/131384418/a6c416cd454.pdfIn PDF document text
    • http://numulul.mygamesonline.org/is_it_bad_to_wake_up_crying_from_a_dream.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/washington_gas_call_wait_time.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/54089127413.pdfIn PDF document text
    • http://fufejezonodim.mywebcommunity.org/did_the_wolf_of_wall_street_boat_sank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_3d062aee4ee9412aa21ef219d3705525.pdf?index=trueIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_0e9beef7aec94c02a8b920c4a3ad2ed3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54865c3c-7330-40f3-86e5-b5fcfb50e650/25948110749.pdfIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_385773140c4942b88135aa6054f62a17.pdf?index=trueIn PDF document text
    • http://zesafemumibow.myartsonline.com/39932294800.pdfIn PDF document text
    • http://penanaras.myartsonline.com/dimixu.pdfIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_8175c90fd93b4ac798527718a40cc5e2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4753eaa-842a-4d0d-b74c-9b418fd1551e/american_playwright_you_cant_take_it_with_you.pdfIn PDF document text
    • http://seroritubofa.atwebpages.com/79852933390.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/bipiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bda2b09-9e76-447e-810a-f0b5eb928ee7/three_stages_of_creative_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bdcb74c-2c3e-481f-9de1-3ecb5f9606f1/dell_xps_8500_i7_for_sale.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_9d7245f9307049a9b0be8cf71e56aa46.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ed775d-0b95-42b3-82d6-4fe6ab4148ea/sony_str-dn840_specs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE340 5656 bytes
SHA-256: 6230af4e81654bb73f7aebe1ba438c1348c43ae94d8a320ef5815e03fb38447c
font_01_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 10672 bytes
SHA-256: 6f2719f3ef5ba3d45b56af087673b9425e8a0e5b070fd973a692391dee3b8d14
font_02_sfnt_off00011b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0F 16084 bytes
SHA-256: 7bb111f4ce79ba48502a837b83d40e55cd246b86015b702aadb01736ca16f5d3