Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccae9037f0df0600…

MALICIOUS

PDF

189.4 KB Created: 2021-03-03 11:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: bcdb74aa956b3b19a790b3d0bc0a056f SHA-1: 6ff3db71fea48fcc724dd56591733382ddf29ca0 SHA-256: ccae9037f0df0600d37a05b0d32cc2d5f0e77d410158256991ae8696ce45bce0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://vilenefex.ru/123?utm_term=guild+wars+2+warrior+leveling+build+2019 PDF link annotation
    • http://pakirekugep.scienceontheweb.net/the_skin_im_in_audiobook.pdfIn PDF document text
    • https://natapoja.weebly.com/uploads/1/3/0/8/130813782/bedebuta-foxumugoxakoxi-rosejorege-vaxarudi.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/Zhghgjj/35314389780.pdfIn PDF document text
    • http://luziniwanemek.sportsontheweb.net/dell_latitude_e6430_i7_3720qm_review.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/kitof.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/5ab72d.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/ranger_boat_dealers.pdfIn PDF document text
    • https://pegavuvusejeda.weebly.com/uploads/1/3/1/4/131483027/3448934.pdfIn PDF document text
    • https://siwurarililoto.weebly.com/uploads/1/3/1/4/131453181/05df7b.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/5hjhauv/us_murders_2019_so_far.pdfIn PDF document text
    • https://cdn.sqhk.co/vikoparif/Xifihha/old_phone_keyboard_name.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/fimawagizadusuwugukurasir.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/jdmNJgi/61541261371.pdfIn PDF document text
    • https://cdn.sqhk.co/gurudulep/hyiiige/madazawibawojilibitij.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/what_does_the_philosophy_of_nature_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/GSighbL/maxpreps_volleyball_rankings.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/how_to_change_google_maps_fastest_route.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pezamax.myartsonline.com/ralobinox.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/29999652614.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/classical_literature_word_whizzle_search_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/sezetu.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_off0002ad6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD6D 5796 bytes
SHA-256: 2896cdf361a3adacc2ef01d3267ba8c02ada12234024091d1f927757c6db4d60
font_01_sfnt_off0002c14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C14D 11252 bytes
SHA-256: 24b7a385c4092b23340954bdde3077806688c1e65b9d4f1dc0c5226c69706b64

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