Malicious PDF — malware analysis report

Static analysis result for SHA-256 e300e674a8cc4cbc…

MALICIOUS

PDF

73.3 KB Created: 2021-03-21 05:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ed11c5d48f8b6b7eba3efa6b5fe036b7 SHA-1: 3e77a784a0006ff06696c88102243163d5278ec0 SHA-256: e300e674a8cc4cbc1f9d7c160a8d11d2291e49ce593ef5cd1c63fc7987d13f08
186 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. One of the embedded URLs, https://jacksth.ru/award?keyword=kamyab+jawan+program+application+form+pdf, is presented as an application form, indicating a social engineering lure. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware delivery attempt.

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://jacksth.ru/award?keyword=kamyab+jawan+program+application+form+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415292/normal_600a6d1b6062b.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/2gjibgc/white_lemuroid_ringtail_possum_climate_change.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/iMhegjs/kepobigixagomuwonu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_6030cab839168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5ff3f914e1d4c.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/djc8qFN/ralph_lauren_bomber_jacket_mens_green.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/igs1Pic/spoken_english_grammar_free_download_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2bd22fe1-9f63-4dde-9377-4fbcb893038c/puvoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06fea9fd-c6d0-4e76-931b-1ae07f523611/convertidor_de_pulgadas_a_milimetros_online.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_b7973a4d085140298729f3b055f5ce93.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_d74538d27b994dfcad9d02e7f769951c.pdf?index=trueIn PDF document text
    • https://0ed7c29b-d5f2-4290-8b47-add6aa38300d.filesusr.com/ugd/32a223_0567fb76e511436eb2861c2c83408e07.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e3ddd1-760b-4ae0-ad81-9d271fec9f1a/how_to_make_outfits_in_royale_high.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_c7bf22e61cac43e2ab46a0ad7951b9dc.pdf?index=trueIn PDF document text
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_eb5d5d01e6e74381bf3e14cfaa8245e1.pdf?index=trueIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_55abcd00fa04415bb991a57c3c4985bf.pdf?index=trueIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_478374ffbb124540b13b2ebd634d4742.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/77750817-f718-4bd9-9e45-8129cccc2e30/36384264685.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_132d139c0e6740f39bf2801a69445317.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f362e9e-b2ea-4fc6-bbed-ed00839438fc/races_of_star_wars_with_pictures.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_8b63a883074d49b9b81a03b5ee018f80.pdf?index=trueIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_3308c785458544bd9d4dd783bd1cccc9.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_73a388d0e39b4f229d00a49dc33c6515.pdf?index=trueIn PDF document text
    • https://0feddc0e-03bc-46a3-a741-45303deff239.filesusr.com/ugd/6ea6a2_b0f50aa39eaa41838cc6b4af8f31a7b9.pdf?index=trueIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_66324c01df6d4106b7a577420b3e8c27.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BA 5348 bytes
SHA-256: 28628ae1769ad931bf659581acde29110f0e51f3209597d97ade41b27d568894
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 10564 bytes
SHA-256: 77782fe176d7a3fe23ab5a8b688746f0b1e91277e19025fe942c97df9af36373
font_02_sfnt_off00010904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10904 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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