Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b17bcebd00dc3f…

MALICIOUS

PDF

87.2 KB Created: 2021-03-05 10:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6ee88c8a7588d3cdb3271c7ff8811e8 SHA-1: 6380ca1389941b5379b539f53dfad92c96e44ad3 SHA-256: c6b17bcebd00dc3f3d686507dec990e1c1f28348d393c0e21091fb31167de825
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=delta+sigma+theta+epsilon+iota+chapter
    • http://converstarget.ru/surgical_recall_7th_editiont19xu.pdf
    • http://nakekizedexu.getenjoyment.net/11307195018.pdf
    • http://hdvideo.design/poulan_electric_chainsaw_16_inch2pzd9.pdf
    • http://worldworkbook.com/how_to_configure_actiontec_mi424wr_router8hw4k.pdf
    • http://pipavinekiga.mywebcommunity.org/2018_polaris_rzr_xp_1000_service_kit.pdf
    • http://kowojolajamuv.getenjoyment.net/jojelumuposegimuzirok.pdf
    • http://car-test.pro/baal_veer_mp4_3gp_tinyjuket4s0m.pdf
    • http://komaxinatobofe.medianewsonline.com/30365405064.pdf
    • http://instapodarok.site/6048565187bswis.pdf
    • http://zugapuvu.mywebcommunity.org/how_to_use_scotts_mini_broadcast_spreader.pdf
    • http://kushtanash.ru/bhaktamar_stotra_lyrics_in_englishqgbzp.pdf
    • http://keepmaxi.space/webafogezevugapotidaniqf8yh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • http://www.daltonmaag.com/
    • http://wutejaxevewef.myartsonline.com/67966438887.pdf
    • https://s3.amazonaws.com/xesigeze/bengali_movie_sultan_trailer.pdf
    • https://1261df91-4e32-40b2-8b8a-4050d3c54cbb.filesusr.com/ugd/df69c1_3e9ad4a6afa44d34a601b70f5d03a078.pdf?index=true
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_76898059584d42bfbfaf01a1c12ba317.pdf?index=true
    • https://s3.amazonaws.com/xovekolamoxe/zakagajikojopowox.pdf
    • https://s3.amazonaws.com/jasadavebaga/is-_450._nc_test_answers.pdf
    • http://ralirajuz.atwebpages.com/61968386997.pdf
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_dedbd9d2ecc345839c59b4932c08de0e.pdf?index=true
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_f3d8fe46e068414eb63d253f5d5d11da.pdf?index=true
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_2e7fd1169cfb4ad6a2c78577f51634de.pdf?index=true
    • https://s3.amazonaws.com/sikuva/juduvamaxaxu.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb02.bin
990533388203515cd01c85f5bdedd19242c685b0967430a92e42485b125fcf94
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5132 bytes
font_01_sfnt_off00010c3e.bin
149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 6148 bytes
font_02_sfnt_off00011c1d.bin
ab647c8ee2d51e6edd65d9e501e9d232471e320841215e7022918e3d1ad2791a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 10688 bytes
font_03_sfnt_off0001409a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x1409A 4324 bytes