Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dc90d918db7695…

MALICIOUS

PDF

69.8 KB Created: 2021-04-05 22:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 1088cb532e76cfa411e76f8f41a2d518 SHA-1: eed81ae1b97fc839940be44a55f8e53e4adf922c SHA-256: 15dc90d918db7695e50c7418c9d0ed76864aadb42a92c1ef73a5adbe67b3395a
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, suggesting an attempt to distribute malicious content or phish for credentials. The presence of embedded URLs points towards an intent to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/award?keyword=manual+de+planos+arquitectonicos+pdf PDF link annotation
    • http://hayatevesigar.online/forgotten_realms_human_settlementsujkyp.pdfIn PDF document text
    • https://pedagojewixa.weebly.com/uploads/1/3/1/3/131398360/269254.pdfIn PDF document text
    • http://ourfutures.space/xutubirabaduj1px9x.pdfIn PDF document text
    • http://chtotakoeverti.biz/wugujafis49fw.pdfIn PDF document text
    • http://septiki-rf.website/what_is_the_strongest_intermolecular_force_present_in_co248hqr.pdfIn PDF document text
    • http://marafonsport.site/mowopajibuzokafugojojikogs6mu.pdfIn PDF document text
    • http://agreevudb.rest/94049577102p60qu.pdfIn PDF document text
    • http://bit-ipo.ru/803008043615mbxm.pdfIn PDF document text
    • http://ita-bio.space/53747317789gjn7k.pdfIn PDF document text
    • http://minuette.me/nonigizevolefejabedr7bz.pdfIn PDF document text
    • http://golomashvanna.xyz/40141250507wlok3.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/doxumaliworoto.pdfIn PDF document text
    • http://love-cosmetics.shop/22274769429y3rqh.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/2117435531091chq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xirixepo/beats_solo_3_rose_gold_walmart.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_9edafd02f8dc44b984563f8742ab9cd3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vunizi/how_tall_is_mason_crosby.pdfIn PDF document text
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_a05a1e56ecbe478e9f67975dd7a44a92.pdf?index=trueIn PDF document text
    • https://cb71deac-5427-4a11-aec2-6feec017c243.filesusr.com/ugd/4cd983_1bd2d4d1e0cb40878216b15b89e1524b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/83630474317.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/canned_corned_beef_nutrition_information.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_26f8a0149e3b45d4b961da568ed8d25c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E7 5280 bytes
SHA-256: d9c778960380bffc46e23caed5a77d8f1c89b993604c560791c9c11811cb01b8
font_01_sfnt_off0000e3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 11824 bytes
SHA-256: 824d28268cf6c95aaae86eb02042fb15e1a45dc12b10f12225a0b7f72c475381

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