Malicious PDF — malware analysis report

Static analysis result for SHA-256 85cea94f41adbf32…

MALICIOUS

PDF

84.3 KB Created: 2021-03-18 02:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 582f894178d34e85b0b6e592b4bf9272 SHA-1: 1e7bfddf356e04d1bcc19e26c659c818900b1a7e SHA-256: 85cea94f41adbf32daf7bc8494e75964d16e0d574cc7b8d688412b27639b9a68
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing trojan. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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 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
  • 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://jottigo.ru/award?keyword=best+commentary+on+the+book+of+romans+pdf PDF link annotation
    • http://itawegan.space/bigesixikin1nyyo.pdfIn PDF document text
    • https://tuzakipimuvujuv.weebly.com/uploads/1/3/0/8/130813756/be6ae6.pdfIn PDF document text
    • https://bopisigo.weebly.com/uploads/1/3/1/4/131453919/bdf101b7c.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/sosamujukuvimet.pdfIn PDF document text
    • http://bella24.xyz/android_auto_2019_toyotalaiz2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8ab33c7-ad89-4c9b-8ed9-1b2495f78808/vefovedokijev.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_10d14c87ed674be0b804bf6e9fc79b19.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_fb0cb88ec03e45a493cfd8411e59e6d6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5444c7e5-8489-4cfb-b7e5-a830c078c747/xaluxuxod.pdfIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_90e8711cc0c0433482f5fc2b78c65c62.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_40664e76a4244654bae76bbcfb76d34f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee08d4c-a85c-423d-b645-dd996d95146e/vunekalimulodizat.pdfIn PDF document text
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_01bb911ebafa44edbc3d08f55853fa76.pdf?index=trueIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_76f88c0243834f0194e1d5b46bb1aee5.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_49eb1f73c8134c55837e85c90a2c3dc2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dc110fb-9743-462b-81f1-96fa833abd9b/what_is_vital_force_theory_class_10.pdfIn PDF document text
    • https://7f58a6d3-5723-489e-a2bd-17fd91e1ddd5.filesusr.com/ugd/655495_c1b484aedde24c92aa80619441c87aac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c587f578-8a4b-4cde-8394-dbc68482b282/how_does_it_feel_to_be_kind.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_e5e21d860e6b42e087cbc697190963e4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1107cf9-92b1-47ec-884d-c0f0e18a584e/podujodaserapudimig.pdfIn PDF document text

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