Malicious PDF — malware analysis report

Static analysis result for SHA-256 2600bd88c66f7072…

MALICIOUS

PDF

85.9 KB Created: 2021-04-03 13:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: eb391e37cef41fe0036410ba266a2bc2 SHA-1: 1f45b362d98fc478ec335669816952c6a4a4d326 SHA-256: 2600bd88c66f707226de5a0cb6dfbf2b738d89750ac7d0113841ca9cfa9267bd
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs, such as 'https://midufefew.ru/aws?utm_term=raymarine+c120w+upgrade', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure itself is designed to facilitate the distribution of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 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://midufefew.ru/aws?utm_term=raymarine+c120w+upgrade PDF link annotation
    • http://all-casino.xyz/8846019803jd3me.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/tapemaru-lerafixepig-bopepugut-bivediwupawopu.pdfIn PDF document text
    • https://vobasonuniba.weebly.com/uploads/1/3/4/6/134668907/6492132.pdfIn PDF document text
    • http://cafechorsu.ru/bohemian_rhapsody_sheet_music_for_trumpett0tfp.pdfIn PDF document text
    • https://dasujodiket.weebly.com/uploads/1/3/4/4/134481559/5726462.pdfIn PDF document text
    • http://praktika-ingenieur.com/top_10_best_forex_trading_strategiesunfaf.pdfIn PDF document text
    • http://namixojebeku.iblogger.org/oxygen_not_included_guide_fr_2019.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/pazusugimopodaw.pdfIn PDF document text
    • https://relorurexo.weebly.com/uploads/1/3/5/3/135391300/kibeminug_xividuzavefado.pdfIn PDF document text
    • https://jugujepatuw.weebly.com/uploads/1/3/4/9/134900825/nagikazojanojobi.pdfIn PDF document text
    • https://jexetapi.weebly.com/uploads/1/3/4/3/134345775/soxuwuz_gukukora_dewoforu.pdfIn PDF document text
    • http://zinobinipote.22web.org/15865304768.pdfIn PDF document text
    • http://bt-management.website/simedogokoxadibemudhgo.pdfIn PDF document text
    • http://liketsven.xyz/353139518601ik9s.pdfIn PDF document text
    • https://sufexijim.weebly.com/uploads/1/3/4/6/134679247/refiriwi-suroxuzomeli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipivolakiwupod.rf.gd/what_was_the_main_idea_of_enlightenment_philosophers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b28fa5-fe4a-4068-8dfb-d29657708e6c/skyrim_xbox_360_tips_and_tricks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d089db-7812-4cb7-8b72-8b312bbd13ad/zofoxokugam.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/kaladutad.pdfIn PDF document text
    • http://napidolir.rf.gd/data_analysis_in_spss_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/aliexpress_apk_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/xebijewelaxezopixaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/448a86a7-7c5d-4df0-bcea-3742aacd3a6c/how_to_use_ds3_tool.pdfIn PDF document text
    • http://lelupiborojez.epizy.com/artistic_fonts_for_logo_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0c9b56-e9fb-4482-86fb-a0551c9a9232/30726482878.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A1 5712 bytes
SHA-256: eff9752870346d7e61a1d568abcc8dca96acd0729840a21b9e9f41c4d519b81a
font_01_sfnt_off0001181c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181C 2064 bytes
SHA-256: c4f350553ad6f77865904fb688ec4babb5155377b8188501ae78e3402c3410e6
font_02_sfnt_off00012110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12110 11936 bytes
SHA-256: aca2cc6439e040b7d53001d7c83117961050844e7eb86b1806c5460288027377

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