Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db87ec07b3a652c…

MALICIOUS

PDF

90.5 KB Created: 2021-01-27 17:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 045096d93eaf432404b863447f134c9c SHA-1: 9a70207ab86470a8fb9d74059bf59a72a86fa5d1 SHA-256: 8db87ec07b3a652c1edf8f2d556b5424fd84db6aeb20e9858bac61f0bb60bea7
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The document body contains text related to 'Pa ebt card balance' and embedded URLs point to suspicious domains, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=pa+ebt+card+balance PDF link annotation
    • http://sdek-24.cc/monstera_plant_seeds_for_salec466m.pdfIn PDF document text
    • http://ranking-se.com/50368887969jx3ne.pdfIn PDF document text
    • https://cdn.sqhk.co/renapudovi/V2yjhgc/72521687502.pdfIn PDF document text
    • http://mebelintera.ru/fantasy_airships_steampunkcpidn.pdfIn PDF document text
    • https://segunimumise.weebly.com/uploads/1/3/1/0/131070895/6045360.pdfIn PDF document text
    • https://sevisexabokiro.weebly.com/uploads/1/3/1/6/131637038/nuxesobifoso.pdfIn PDF document text
    • http://vajamerafimal.iblogger.org/gejewirenosepotiwuvu.pdfIn PDF document text
    • http://kraftmann.su/tiles_hop_color_ball_3d_downloadkif4l.pdfIn PDF document text
    • https://sisuwajad.weebly.com/uploads/1/3/0/8/130874073/zuxatirex.pdfIn PDF document text
    • https://xatiletovolut.weebly.com/uploads/1/3/1/4/131409128/23daa5978e238.pdfIn PDF document text
    • http://hookup668.site/ballet_classes_near_me_for_12_year_oldsaupba.pdfIn PDF document text
    • http://microdigitalmeter.xyz/tgrt_radyo_tiyatrosu_indirfw19w.pdfIn PDF document text
    • https://cdn.sqhk.co/munuzimevu/d4gdZii/losomifagesogewubajewilis.pdfIn PDF document text
    • http://esclick.pro/dasiwoxedopegebonosopedml5cd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://riberudedanute.epizy.com/the_long_journey_adventure_game_mod_apk.pdfIn PDF document text
    • http://zarazemudaseri.epizy.com/nifubidemusilenomer.pdfIn PDF document text
    • http://limekukojaso.epizy.com/aptx_adaptive_android.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/mba_cat_exam_form_date_2019.pdfIn PDF document text
    • http://mogegan.epizy.com/vexejisuledosavevazo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 4896 bytes
SHA-256: d003232f48e9f179960f82c1b31cf7d2bd0ce7c74744e60506d4910e30fdcac1
font_01_sfnt_off00012179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12179 11024 bytes
SHA-256: b27b5118586820a079e52c747e36f0ee4b5bd2b7193a3359027b2b4e9bf57a11
font_02_sfnt_off00014768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14768 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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