Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c250b31fbcb076d…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 16:27:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6756311bc7e3a5adac918e8de3ea306 SHA-1: 7f26d4c656317052c7bbdade28e4ea9378bcb0bb SHA-256: 5c250b31fbcb076d3f8cd2dd9fa9aab3a9a40a35450ef9ea7a9d08d09192b333
196 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into paying fees for a prize or parcel. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://jumiwimov.ru/award?keyword=android+studio+tutorial+point+pdf
    • http://mazikopipovix.mywebcommunity.org/percy_jackson_first_book_online.pdf
    • http://pubguckazan.com/lojowhi79z.pdf
    • https://vezajufarazigur.weebly.com/uploads/1/3/4/2/134265717/gaxejumabov-karamejenireter-lawukar.pdf
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/pavitunuwejob_vatev_xakalur_fokovuraxixef.pdf
    • https://cdn.sqhk.co/fuvebopeweb/jiLjbig/9416659660.pdf
    • https://cdn.sqhk.co/dupabeket/fidUajf/tourist_guide_translate_in_malay.pdf
    • https://cdn.sqhk.co/pubabolab/UlwWha0/99260761822.pdf
    • http://detonic-ufficiale.website/nogunubiloxirubamotevoriqyza1.pdf
    • https://pizakatunif.weebly.com/uploads/1/3/1/8/131856177/3257199.pdf
    • https://wavixozuxukoreg.weebly.com/uploads/1/3/1/3/131380445/bugumuz-momunetafuvimi-miwize-pajelozeze.pdf
    • https://cdn.sqhk.co/muvuxaji/jbN1LdL/uber_jump_bikes_san_diego.pdf
    • https://fabegobidik.weebly.com/uploads/1/3/1/4/131437275/letexinurujetame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_2c63a4d504384dc194f1732f8e7ede67.pdf?index=true
    • http://bufijonewufo.onlinewebshop.net/ejercicios_angulos_y_rectas_3o_primaria.pdf
    • https://f11c4bf2-12a6-49f8-9590-07a94b689168.filesusr.com/ugd/11276f_683a66433ecc45049c7fe0c69381bf06.pdf?index=true
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_bde2346061d9432c84bd3856c2486373.pdf?index=true
    • https://s3.amazonaws.com/libusamagowuvo/axinterop_mstsclib_dll.pdf
    • https://s3.amazonaws.com/lorerexeg/nununutiwexobovadori.pdf
    • https://s3.amazonaws.com/zafijukopa/1st_grade_worksheets_language_arts.pdf
    • https://s3.amazonaws.com/bidurudilidujug/factors_affecting_biotransformation_ppt.pdf
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_7f9d81bd80b94d0e8c0979dde7f9ddc3.pdf?index=true
    • https://s3.amazonaws.com/toniseligiwuzux/84770782600.pdf
    • http://fajenadiwizowo.atwebpages.com/shark_navigator_lift_away_pet_vacuum_uv500wm.pdf
    • http://wilaroxu.atwebpages.com/2023810742.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e836.bin
e12ed8cdbaf5ccab37d3755fe64a1db410cb5fb531700e476ec3d0da7937b1e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 5024 bytes
font_01_sfnt_off0000f95c.bin
b3073f2b42971b2c36a85b13818b3825935610494622d236ddda4a81b55e8033		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF95C 10500 bytes

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