Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d8e293d7d97081…

MALICIOUS

PDF

85.3 KB Created: 2021-04-12 11:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b652f40b033ab15ad406ce5b61d9637d SHA-1: 20917f828f4b17990f18251dd3664925ed43b98c SHA-256: 47d8e293d7d9708198c6fa14c48f9563d640858128ba8438a163a2b9620223c2
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or redirectors, indicating a link farm designed to distribute malicious content or phish users. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest this intent. The presence of a URL with a 'utm_term' parameter further supports the idea of a targeted lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=murray+riding+mower+bagger+attachment PDF link annotation
    • https://cdn.sqhk.co/voduzetefir/lcLpOpW/numbered_answer_sheet_1-_100.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/iigjghb/republique_dominicaine_carte_punta_cana.pdfIn PDF document text
    • https://cdn.sqhk.co/bogovureg/hkPif0t/lazutamapa.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/english_literature_textbook_grade_10.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/fjfhgjc/42183243635.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/clinker_composition.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/D6gcSo5/dragon_city_breeding_heroic_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jfRFcge/35320499203.pdfIn PDF document text
    • https://cdn.sqhk.co/rulopojuna/jgshdmX/bajni_lado_piya_song.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/lhhaLE4/no_sew_metal_jean_buttons.pdfIn PDF document text
    • http://vegofejolafud.mygamesonline.org/64644238851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_0c1c66cbc2654471ba3857305dc17795.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_1913bba21b2743669b7642b1ecc496a3.pdf?index=trueIn PDF document text
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_bd3ba64e78bc42ce8967aa98961e2371.pdf?index=trueIn PDF document text
    • http://fogokenum.onlinewebshop.net/ielts_semi_formal_letter_sample.pdfIn PDF document text
    • http://wudazebej.atwebpages.com/carl_jung_personality_theory.pdfIn PDF document text
    • https://73a1781f-5c9f-4c76-8a11-a8e8c44f336a.filesusr.com/ugd/d9f7b5_b58d4548ee184deb8d6e804b36d7b219.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_418abcba8a8e49f3836ff0147f2324f5.pdf?index=trueIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_49ed0dc095e74d7ea26a3d9dd854a83c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ligole/idiots_guides_music_theory_3e.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/westinghouse_40_inch_tv_manual.pdfIn PDF document text
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_d9a5cd62b785421aa87694393c73c3f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/4107975940.pdfIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_7c5d14c5720d466889382f7c4bc1797b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/arduino_ide_on_debian.pdfIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_c5d6ac66bfcd4778be11a0ad60ace683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/11343226924.pdfIn PDF document text
    • https://f8e303d0-f350-43d2-b7c3-f886ef13ec25.filesusr.com/ugd/1bb397_29549e5a85e641609abed8150f80e9f6.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 5484 bytes
SHA-256: db6108a663e099cd60720bec8632a3c3432aaefedbc34abbca7dd74b487109b0
font_01_sfnt_off0001222a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222A 11104 bytes
SHA-256: d45f41b62a47a68e55adb7b201cc333e82b88d114bd078bea78736473ffe40d2

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