Malicious PDF — malware analysis report

Static analysis result for SHA-256 e212247fdcfff505…

MALICIOUS

PDF

78.9 KB Created: 2021-06-06 10:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 35d0e4a536d99bdb178a9a3f63adc8a8 SHA-1: 9f8b9d8f79dfe559ab4578a9c91b0a6259f9f3c0 SHA-256: e212247fdcfff505684a85a80dfd8809dd56a93ac8e79e44f804f61c7acdd454
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://cdn-cms.f-static.net/uploads/4443292/normal_604fb326994ed.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_6030f7f0ba2d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_60505a1c2411f.pdfIn PDF document text
    • https://tujelogujonugi.weebly.com/uploads/1/3/4/4/134491942/828e36403c401bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_6013c776593f1.pdfIn PDF document text
    • https://tatonipek.weebly.com/uploads/1/3/4/8/134874136/finunum-pirad-najelokomuzuv.pdfIn PDF document text
    • https://puwawegolawibot.weebly.com/uploads/1/3/2/6/132682739/tuzamolibod_zuvedeletete.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368972/normal_5ff98e22b957c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417314/normal_6040b33d31796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449399/normal_60113554be494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_600bdac036c89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=lista%20de%20verbos%20presente%20simple%20y%20continuo%20en%20inglesPDF link annotation
    • https://uploads.strikinglycdn.com/files/475611e7-eeca-488d-ba4c-e961b7c0a338/66467383397.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144527934/53955442391.pdfIn PDF document text
    • http://favixose.pbworks.com/w/file/fetch/144553329/cambridge_english_for_engineering_students_book_free_download.pdfIn PDF document text
    • http://keborekudud.pbworks.com/w/file/fetch/144686955/corel_draw_x8_portable_espaol_64_bits.pdfIn PDF document text
    • http://sapixesut.pbworks.com/f/what_is_the_salary_of_a_marketing_manager.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/f/36497104575.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c52810d-8c3f-42dd-b058-ac5fd453cb49/pythagorean_theorem_spiral.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144610329/scott_pilgrim_vs_the_world_comic_vs_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89da10bd-f43c-4fd4-b6bb-4ef99fa0aba5/7696966478.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/f/why_wont_my_heyday_headphones_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9571c8ad-80de-4faa-8ceb-d73f360e1ab0/critique_of_everyday_life_volume_2.pdfIn PDF document text
    • http://rixepal.pbworks.com/f/touchstone_4_unit_11_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f847760-d78b-4f52-9ffc-c3096b2b3858/jupugosidixuxutomupikik.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_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 5636 bytes
SHA-256: b523f951115fd8cb14c98c2a023dff11aa49794b1c71e237bf500d31b47f13be
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 12092 bytes
SHA-256: 99ac0c8f17485f3070fc354928bda9e11aa4bfb884e2395e43a891963b5c9ace