Malicious PDF — malware analysis report

Static analysis result for SHA-256 e367ede798619dec…

MALICIOUS

PDF

83.4 KB Created: 2021-03-14 14:42:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 511dc52d48ce67003bb36e455b8cc88f SHA-1: 1429fd12d5a245d834a1dee46a92e9a38ac1867b SHA-256: e367ede798619dec4e2d3b54bf3bd1048b97f7c69abe6e935408584d40b086bf
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. This suggests a malicious intent to manipulate search engine results or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or trojan distribution.

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
  • 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://lozipotod.ru/award?keyword=cesare+pavese+poetica+pdf PDF link annotation
    • http://bluebadgeform.com/yep_120a_programmingxch5r.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/22150.pdfIn PDF document text
    • http://getcabinets.xyz/asmaul_husna_adalah_nama-nama_baikbczii.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/QL7jbax/nexelepolakupewojur.pdfIn PDF document text
    • http://onlinekartiadesi.com/27221280468mxl0l.pdfIn PDF document text
    • https://tuxewuwa.weebly.com/uploads/1/3/4/7/134776055/xunudo.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/lRgh9gh/7911157430.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/vedakerojixafibujus.pdfIn PDF document text
    • https://jijibaduwa.weebly.com/uploads/1/3/4/4/134495912/topegapovorosejof.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/009287fb4c858c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d0fd53c2-66a5-49f7-a942-a4bfc50892a3.filesusr.com/ugd/11baf9_8206a61b06f6434abd375fb68a1c0d35.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c4b746-a0a2-4a61-8a35-94d1b360e001/how_to_you_define_religion.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_9df27361278d44cea9fc03917aee1002.pdf?index=trueIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_be6836b1c5f74d759c610a3d556bd95f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ee1582-9628-46a5-9901-62a5f88d097a/30925770496.pdfIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_7b6e80a75308436fa86dedde3814e84c.pdf?index=trueIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_185c22c520684dff9c26425848b8b30e.pdf?index=trueIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_ff42fe51153542219956dee67f8b7961.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_0e0d9a9eefc044a69e8317eef84f6882.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88dbbb5d-0c09-43ea-9d37-eca3f40442e0/why_are_my_keyboard_lights_not_working.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_off0001077b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 5080 bytes
SHA-256: ddb208a731fb09c13faf2f4b59461a70634bb46b6b12ad0168caedf762a74b2f
font_01_sfnt_off000118d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 11736 bytes
SHA-256: 7362f7ec59de882acfde5a93d94a9dce29594da13b347cb61b72564665e627db