Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e278c23eccf1c9…

MALICIOUS

PDF

77.3 KB Created: 2021-03-07 21:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3fc7b2dd127fb986be65899f42971790 SHA-1: 058515ed402cd41d2383ad130def144bb9119f16 SHA-256: 28e278c23eccf1c904688a1ff12c8d13248df1fcb5e864a21b1971ac8fb43a69
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'how to renew sora license in nj'. The presence of many external URIs and the ML/ClamAV detections strongly suggest this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/strik?utm_term=how+to+renew+sora+license+in+nj PDF link annotation
    • http://xoguvux.22web.org/jozijozonufopemake.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/pukagot.pdfIn PDF document text
    • http://rumigiwataj.getenjoyment.net/is_rheem_a_good_water_heater_brand.pdfIn PDF document text
    • http://torchland.xyz/how_to_check_brother_printer_ink_levels5bwv2.pdfIn PDF document text
    • http://robot3.site/durogovifuwirah64x5.pdfIn PDF document text
    • http://italywow.pro/how_much_do_babies_sleep_in_the_womb_at_24_weeks3v1kb.pdfIn PDF document text
    • http://relibafogat.sportsontheweb.net/77485766351.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/59883802055.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/buxuzupimirobufuzazipamit.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/51199252261.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/15592067680.pdfIn PDF document text
    • http://koparikamoze.scienceontheweb.net/mituxuwamobol.pdfIn PDF document text
    • http://marketeuro.pro/radio_shack_scanner_instructionscqdr9.pdfIn PDF document text
    • http://kawofeme.iblogger.org/sufawomanexoso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vijatabudevibe.epizy.com/waterboss_380_setup.pdfIn PDF document text
    • http://mifamin.epizy.com/allure_2017_full_movie.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/crochet_patterns_for_chemo_hats.pdfIn PDF document text
    • http://fukijudetoj.epizy.com/shop_leaflet_template.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/91065855590.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 4920 bytes
SHA-256: 886dcb500b6af058fa2fb148babfaba5555c855b95bd632cf3d4cfbcf637c7bf
font_01_sfnt_off000103b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B2 10624 bytes
SHA-256: 58d3be6e47cac4849a50a487af1a8d4932e111753a03265b5da159377a69f833

Open this report in the interactive analyzer, or submit your own file for analysis.