Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b72813479f66cb…

MALICIOUS

PDF

75.8 KB Created: 2021-03-31 08:07:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 081b1375f38e262d1afaf7588137514a SHA-1: 808a5417b3699050af4da7587642e40d2420eb40 SHA-256: 59b72813479f66cbff5595ccaa2e8bd28f4df0c35824274a9f160e38d48391fb
126 Risk Score

Malware Insights

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

The PDF file contains an external URI pointing to a suspicious domain, identified as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though obfuscated, contains keywords related to the URL, suggesting a deceptive pretext for the link.

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://xezojetit.ru/award?keyword=application+of+2nd+law+of+thermodynamics+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454432/normal_601c5bf0a1f12.pdfIn PDF document text
    • https://ragurukenawuxif.weebly.com/uploads/1/3/4/6/134667210/bisupefunuwatid_domifopojetaxo_vozameke_bamekijev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_600e47c741c71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468871/normal_60379e9e0e106.pdfIn PDF document text
    • https://wufomuwu.weebly.com/uploads/1/3/0/9/130969972/lufis-tifivabapuxoti-zulusofiwen-vifes.pdfIn PDF document text
    • http://vonomejiri.iblogger.org/stanford_encyclopedia_of_philosophy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415756/normal_5fe423e2e56a2.pdfIn PDF document text
    • https://jogexolo.weebly.com/uploads/1/3/5/9/135957561/8793447.pdfIn PDF document text
    • http://nejuwenazi.iblogger.org/pubat.pdfIn PDF document text
    • https://xazebuwojij.weebly.com/uploads/1/3/4/4/134467588/25c427fb75ee2c3.pdfIn PDF document text
    • https://suzixibaru.weebly.com/uploads/1/3/4/7/134709676/544695.pdfIn PDF document text
    • https://gurekageta.weebly.com/uploads/1/3/2/6/132695257/kajusutagibiba-refiwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85a3f927-7d22-4438-8bc7-76a551c15c68/racing_rules_of_sailing_appendix_u.pdfIn PDF document text
    • http://topeleseluvon.rf.gd/bncc_ciencias_humanas.pdfIn PDF document text
    • http://lemijafuw.epizy.com/51159148138.pdfIn PDF document text
    • http://sikofus.epizy.com/avast_antivirus_app_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f2910b-ce58-49a8-89be-a7afa9f2a1cf/dont_get_lost_in_the_sea_of_despair.pdfIn PDF document text
    • http://xuvagakinev.rf.gd/cub_scout_wolf_leader_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba852dd7-90a2-4545-ac6a-b7a5257e0239/doctor_sleep_trailer_reaction_mashup.pdfIn PDF document text
    • http://talifox.rf.gd/nc_controlled_substance_reporting_login.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_off0000e84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84C 5708 bytes
SHA-256: b8c398f7517cbb2609fe943da8e217bc9295818f47bc200b5c11fb603280897f
font_01_sfnt_off0000fba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA7 11132 bytes
SHA-256: b2624fd70299d1ddf762d0a4cdfbf1d01bcd958f3dfcc40952f1825fa2f37917

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