Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a5825d84d59654…

MALICIOUS

PDF

94.2 KB Created: 2021-03-23 04:12:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d0384af781deceeb6400cafb5fc16cc8 SHA-1: b11fd656a78ed5257250a2de2cc8ed89bac38766 SHA-256: 76a5825d84d59654e268841ad12f256600e765f6cc615aafd3ad6026efa93048
136 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a lure for free downloads, redirecting to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=nixon+51-30+chrono+gold+red PDF link annotation
    • http://dusamoka.mywebcommunity.org/what_are_the_best_vacuum_sealer_bags.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_6002c8e1374b9.pdfIn PDF document text
    • http://rutidewebatodug.iblogger.org/biblia_ortodoxa.pdfIn PDF document text
    • http://noxopadorilu.iblogger.org/bhavesh_joshi_superhero_movie_480p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5fdac90501acf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380379/normal_600746d8aaed9.pdfIn PDF document text
    • http://lufosopaxukil.getenjoyment.net/zubalofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_60151e4b1a83d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409610/normal_603b577244387.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/how_to_perform_salatul_istikhara_for_marriage.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/8628002340.pdfIn PDF document text
    • http://borarizi.epizy.com/fuvilibojijemisojimaxiro.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/20495141845.pdfIn PDF document text
    • http://xowevabi.epizy.com/55826171457.pdfIn PDF document text
    • http://guziruxasa.epizy.com/40716597160.pdfIn PDF document text
    • http://xonukekavufimil.epizy.com/m_a_communications_plan_template.pdfIn PDF document text
    • http://xoxitazowakovit.rf.gd/83887074513.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/surotuwigolubofefega.pdfIn PDF document text
    • http://mugekalamiwatek.epizy.com/spreadsheet_for_tracking_finances.pdfIn PDF document text
    • http://zekumituvi.epizy.com/world_map_with_countries_black_and_white.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/mackie_808m_vs_808s.pdfIn PDF document text
    • http://rawarawoxegig.epizy.com/adobe_premiere_pro_cc_title_templates_free.pdfIn PDF document text
    • http://zuvojiveko.rf.gd/2006_nissan_altima_service_engine_soon_light_blinking.pdfIn PDF document text
    • http://xevarefuwiku.epizy.com/how_to_calculate_settling_velocity_of_particles.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://www.gnu.org/licenses/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000103f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x103F6 16020 bytes
SHA-256: 29f362fac65bb0341be7fd83e149c07910fcba6f952673dd09b28e42b1936f6e
font_00_sfnt_off0000f1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 5364 bytes
SHA-256: 8c0a89e2ec8977626d6d02cf97f625c67768f472d5dca40b06d4216c3f47e73b
font_02_sfnt_off0001301e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301E 11136 bytes
SHA-256: 84eb41e9d1cafa3c331cb4ca12170e9b3bb2d9cba1b281c807bcb4723766b2b7
font_03_sfnt_off00015636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15636 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb