Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a260aad28e2aef1…

MALICIOUS

PDF

88.0 KB Created: 2021-03-10 15:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 42c9612f6a05e820a58bd10c7a0858e3 SHA-1: eacecf2f732336399eab4b723bd5780e61432fba SHA-256: 0a260aad28e2aef1d544fc85d36487580306f641bb3381634fd0479c93b3e870
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this, indicating the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dugedepap.ru/strik?utm_term=dirt+devil+endura+express+compact+upright+vacuum+reviews PDF link annotation
    • https://vemanilulo.weebly.com/uploads/1/3/4/3/134378365/5745557.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/bunezipusilabazu.pdfIn PDF document text
    • https://mewurotimopu.weebly.com/uploads/1/3/1/3/131381658/xanotuwud.pdfIn PDF document text
    • http://rixegubinufu.iblogger.org/75534000203.pdfIn PDF document text
    • https://ruwegevenimeva.weebly.com/uploads/1/3/0/9/130969935/ec8ff0ce69.pdfIn PDF document text
    • http://doporujela.iblogger.org/indonesia_visa_application_form_dubai.pdfIn PDF document text
    • https://maduvifodowemo.weebly.com/uploads/1/3/4/6/134692972/5f6a0585f76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d4bf38-f6ab-45fd-b097-1df98c500839/play_elder_scrolls_arena_online_free_no_download.pdfIn PDF document text
    • https://28a90398-13b1-4b58-b54c-ed045a6bddf2.filesusr.com/ugd/7e9e1f_b09622e96214445e83c3d1fde3a83b23.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcae99f-91eb-4058-bb02-7718041db8f8/gawaneputelisemup.pdfIn PDF document text
    • https://32b33340-d9da-4ef7-b3bd-a0ac5134eb71.filesusr.com/ugd/adfa6f_933aa45b087b4858a5bc2d00a4c22f59.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba133784-6a03-416b-881f-e426e4f825e4/brother_printer_hl_2140_driver_download_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd01539f-541d-4a4b-84ea-a0729e59d9ed/fexopij.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_10041ee67cf54afab1c29e56644edf52.pdf?index=trueIn PDF document text
    • http://mizebonemis.rf.gd/adobe_reader_9._5._5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4e94a0-b737-4879-a695-047dafa829ff/zopugekaruxanef.pdfIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_3d158ace7dd543a985301604d1c100ac.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_9f99b79bdfb54c3cae9fd45d094a4c3b.pdf?index=trueIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_f7f8727bb32f44048affbc1f7bff3539.pdf?index=trueIn PDF document text
    • https://c63ca81c-6df4-4ec3-bc2e-8508f29a6879.filesusr.com/ugd/d48fe3_588fbd29fe4441f693c247b3fa07fe38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5927557d-1d86-41b9-9d11-8e7b1c4e7b80/mitonomafa.pdfIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_5047460bf805442bab36d3df7e6e926f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c68e4211-3160-4827-bc36-425cb8cbee7f/defiant_led_motion_security_light_flashing.pdfIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_c608b78c02054a60ba92ed07fe12d9ea.pdf?index=trueIn PDF document text
    • http://xososalubebejen.rf.gd/c_open_in_new_browser_window.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013724.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13724 17092 bytes
SHA-256: b686fcd44d5ad8e296f4897a9c2bd3442ca0f2f2dc6000f84bde5089fac30e9e
font_00_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 5704 bytes
SHA-256: ddfd146eb0bdbfd1576136c00eff1564b672f6724176ff65fa2b0e27f2d93a35
font_01_sfnt_off0001122a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1122A 10760 bytes
SHA-256: 95cbd5e6bc1fc76e727d02d4a3d224134759180f85da3e760d8181688099e0a0

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