Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8230603dbdc4ff8…

MALICIOUS

PDF

98.2 KB Created: 2021-06-06 18:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9714226f2de52fe9b12fccdf0b0f529d SHA-1: e270a3b980555df534563ace8958208f8b095ca0 SHA-256: e8230603dbdc4ff8dffb596da4311b529da966af1f890af2525d2f5bb281b810
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 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://allytemp.ru/pbw?utm_term=expresiones+que+jerarquizan+la+informaci%25C3%25B3n PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5fdd3304e12b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408981/normal_606b184989038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://nagaxop.pbworks.com/w/file/fetch/144609480/34264191137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c64f3b-5647-4e48-b982-6a34d2acffa9/spalding_portable_basketball_goal_parts.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/f/types_of_nouns_worksheet_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f47b72-5e10-417e-94f6-f020dca5493f/wubusepixem.pdfIn PDF document text
    • http://kakexigodelo.pbworks.com/w/file/fetch/144575496/9._snf_palme_fizik_konu_anlatm_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8670125-0ad2-4d14-b243-d54f85ce7207/pimp_by_iceberg_slim_movie.pdfIn PDF document text
    • http://lefilep.pbworks.com/f/what_are_the_non_verbal_cue.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3374ed63-aa41-4ab0-849e-84fec4efe932/necchi_supernova_julia_service_manual.pdfIn PDF document text
    • http://runaliguredu.pbworks.com/f/how_to_use_light_transfer_paper_on_dark_shirts.pdfIn PDF document text
    • http://rimogeto.pbworks.com/f/17937937029.pdfIn PDF document text
    • http://bukafag.pbworks.com/w/file/fetch/144569175/jamamofif.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/f/49305738541.pdfIn PDF document text
    • http://zepupifob.pbworks.com/w/file/fetch/144426084/how_to_find_average_speed_in_physics.pdfIn PDF document text
    • http://jetipufagi.pbworks.com/w/file/fetch/144674508/what_is_a_divine_revelation_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfaa1ddf-e3dd-4acd-a7c0-1f9b0c9e6c3e/daxotidiwuwepukekobifow.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/51783440720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f84f81-ac92-4174-b251-1bc41ca1064f/81556821354.pdfIn PDF document text
    • http://pebakix.pbworks.com/w/file/fetch/144731046/voldemort_origins_of_the_heir_in_hindi_free_download.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/w/file/fetch/144503793/xem_phim_tam_mao_phiu_lu_k_1996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a50f7d-2a0b-49c4-af59-762f903002f4/aviation_weather_metar_archive.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3C 4280 bytes
SHA-256: 3a4d084b2be71e5c33a11f7ab3b17cfb206da4ba7dd335e47893322f5b13c51f
font_01_sfnt_off0000f979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF979 5572 bytes
SHA-256: 9dbc67960b59917ec6c908fb63c67d149b7595c4e01c83fd8b62777eb21c7698
font_02_sfnt_off00010c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2E 2724 bytes
SHA-256: 44de97134ad79d4dfb779878ba3a709c94a83e1004230199bdba13b9d18dd9f7
font_03_sfnt_off00011770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11770 4476 bytes
SHA-256: d492c7b73f8f14f03598fefcd41d515ed1c8046e09ea4e5f1977220f72fd6d64
font_04_sfnt_off000125e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E3 15800 bytes
SHA-256: fc145668f6b85281863a77986ebc2a43ec46215684c808485a21a2a2ed0f1155
font_05_sfnt_off00015461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15461 16564 bytes
SHA-256: 317c8f2613f4fe55200250755b35c4ee4a50eec6ed5492cca3cd88bc6399f76b
font_06_sfnt_off00016b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B3D 2840 bytes
SHA-256: b548cc9e1a87b3c490f8729e03ced34156290f4049b76f054dc230493866f3e3

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