Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb0447d5732784c…

MALICIOUS

PDF

91.2 KB Created: 2021-03-14 23:31:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 29998dd352bfc5661a4442253e5efe21 SHA-1: 7536d8e0bed3e5c81e000b00ffd0ac6decb815b6 SHA-256: 4bb0447d5732784c09293691e2295a0e7808e2c59168db91c54352453d359c57
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses deceptive language to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/strik?utm_term=sample+fleet+safety+program PDF link annotation
    • http://strapslap.online/fariwizawomakebapobepo69lp8.pdfIn PDF document text
    • http://prostotit.site/english_grammar_aptitude_test_questions_and_answers0oqoi.pdfIn PDF document text
    • http://garantiya62.ru/kindle_oasis_instruction_manuals326w.pdfIn PDF document text
    • http://zelopaqq.xyz/zifufupufab2pw6f.pdfIn PDF document text
    • https://neruwutuwi.weebly.com/uploads/1/3/5/9/135960217/xudupuxurifuzew.pdfIn PDF document text
    • https://sibanomo.weebly.com/uploads/1/3/0/9/130969588/mizusuritupo-novide.pdfIn PDF document text
    • http://gatorama.space/at_the_mountains_of_madness_graphic_novelmbr1x.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/c98832d3.pdfIn PDF document text
    • http://mebelintera.ru/to_do_list_notepad_amazonawupu.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/b74ba7a2-53c1-4258-bdeb-c6a0a438dc91/rasudezijuditujoranebud.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/past_present_and_future_tense_worksheets_5th_grade.pdfIn PDF document text
    • https://66453bd2-5859-4296-8146-ea70795e48b9.filesusr.com/ugd/2d797c_d8d2be7e1f5a4f3eaaaf9f950c47a12c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00a0a47-f09a-41b9-8c3a-bb801b70f37f/how_to_set_up_the_honeywell_thermostat.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/mabunasamoxotafiwevikan.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/whatsapp_sad_profile_pic_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9e3df7-b4e5-4cbc-9368-ac722742dad7/nanebobuwal.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/can_window_ac_units_heat.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/stephen_king_hardcover_books_for_sale.pdfIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_bbf660b062b343bd8e0fdb6f11c73c3c.pdf?index=trueIn PDF document text
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_097059cbbc3d4ac899b2fedac1f90e6b.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BA 5424 bytes
SHA-256: cea76ded7ef8f962826dacbdfa4792c751f1de9d4175f34f394980bb3fc0a11b
font_01_sfnt_off00013c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C22 10520 bytes
SHA-256: cd3dd0703a72ee3579a764a464cf7e75d509e28472e32191d0e81d7aa08a5a4c

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