Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d9ee6fbb0c97d7…

MALICIOUS

PDF

73.3 KB Created: 2021-05-29 15:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 71c729a0fe8e4b2ab9cebf754c0fc81b SHA-1: e32aef5e84cba655f6a5f1c94d7893f3739e20bb SHA-256: d2d9ee6fbb0c97d712c86cb701dbb35b70255151c86664c373cbae41e1ea485c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. Heuristics like PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM strongly suggest this malicious intent. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/strik?utm_term=ff14+carpenter+leveling+guide PDF link annotation
    • https://besunuvoduzusub.weebly.com/uploads/1/3/4/2/134266379/gumakonubekilase.pdfIn PDF document text
    • https://wapojopaboxijok.weebly.com/uploads/1/3/4/7/134747084/9539574.pdfIn PDF document text
    • https://guveroza.weebly.com/uploads/1/3/4/4/134484502/301883dd.pdfIn PDF document text
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/35776.pdfIn PDF document text
    • https://sowubibuf.weebly.com/uploads/1/3/4/3/134308786/fimujebivasiko.pdfIn PDF document text
    • https://sovinupuni.weebly.com/uploads/1/3/4/7/134762808/1450726.pdfIn PDF document text
    • https://mokomopepu.weebly.com/uploads/1/3/5/3/135333670/8445278.pdfIn PDF document text
    • https://woxevodojagub.weebly.com/uploads/1/3/4/6/134623787/7892757.pdfIn PDF document text
    • https://vafeperaj.weebly.com/uploads/1/3/4/5/134586379/ropavarerurowap.pdfIn PDF document text
    • https://vimopoferozure.weebly.com/uploads/1/3/4/8/134858925/lifijazozudaso.pdfIn PDF document text
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/texifukiroriret.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5ff176ba64187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419836/normal_6038e00ac7c94.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/tegunilatetibagezub.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/5206748a-c4ac-4740-abe5-0260459cb78b/what_age_is_rainbow_six_siege_suitable_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9236ea2f-2e53-4ef0-8e0d-dc8b14498dff/how_many_calories_in_a_dunkin_donuts_chocolate_glazed_donut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391e0553-e641-411d-ac84-52ff2a74fd20/can_you_still_buy_cartridges_for_cricut_expression.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f37fe03-bb04-4c3a-8cef-8cc12fb82aa9/the_girl_king_full_movie_english_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147f6045-4767-4545-a721-c9c9560b04a6/glencoe_chemistry_matter_and_change_online_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41978af-b65e-474c-b29a-fa09170c95be/37294040251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e577952-2cb5-466d-b2c4-2cd8a2b93a5a/rhyme_scheme_lesson_plans_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadae087-5cde-4231-9db6-22d7a5e1e602/78241436762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411bd2af-2d85-411b-935a-15906af3966b/semiconductor_devices_physics_and_technology_3rd_edition_solution.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_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 5300 bytes
SHA-256: e9163b7c61dbe6635df85086fb93dfaea0ac056006d263aec083f88861cd4afa
font_01_sfnt_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 11084 bytes
SHA-256: 428a1b76d3450d1d92c22b13701711445a0431186539bab1bcb39ee4e7c79b88

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