Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c01a572bea3139…

MALICIOUS

PDF

76.1 KB Created: 2021-06-09 09:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5e9cfdb397b1a514db37fd78cbf2ee56 SHA-1: 9a3a91d50a3dab330c04a65f70f4693e4634b4ce SHA-256: 32c01a572bea31393c69554e236d685130e61184ed726f23525e145428fad29e
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 0.9997

Heuristics 5

  • 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 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://synerhu.ru/pbw?utm_term=shootout+at+wadala+watch+online+movies PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fcdbca444c4f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453134/normal_5fed5dc5a51d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144834099/rococo_era_timeline.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144426099/madras_university_arrear_exam_hall_ticket_april_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b42f46-4558-45d0-b153-afd7e6875e3b/what_are_some_creative_thinking_skills.pdfIn PDF document text
    • http://dejimebez.pbworks.com/w/file/fetch/144427626/vuwetiseguvodigiruler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1240adb2-d230-4cd6-8651-ce0ec0a1bc0b/seeleys_anatomy_and_physiology_10th_edition_lab_manual_answers.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/f/recenseamento_da_populao_angolana.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/f/wurusirapid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ce590a-48be-4e35-965b-136c3d26d687/bill_mollison_permaculture_a_designers_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2668d788-ab59-4ce8-9cdd-369b1c975660/how_to_convert_vertex_form_to_slope_intercept_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9b4c30-a270-410c-a79f-8516445a9da6/32016517740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fb59e96-c92b-4b45-9526-4d86cf9defc1/1259777537.pdfIn PDF document text
    • http://kesowununak.pbworks.com/f/how_to_refer_to_a_sheet_name_in_excel_formula.pdfIn PDF document text
    • http://zuvuwiro.pbworks.com/w/file/fetch/144724476/1133059452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38b0e90b-5b03-4b6f-a13a-b0a94d607f31/43940623499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb2c00a-9b1c-4366-8ef0-cb38d0125412/table_topics_for_toastmasters.pdfIn PDF document text
    • http://ragasegena.pbworks.com/w/file/fetch/144661635/vokilokefex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5caa1ee-3c18-4460-b308-7c4039a0ebfd/moca_test_instructions_francais.pdfIn PDF document text
    • http://wekanivu.pbworks.com/f/which_size_aeron_chair_should_i_get.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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 5336 bytes
SHA-256: 1b48a1aff6462d87bb2349083a748db945ccf22c67961d320025f1b7936b2ba9
font_01_sfnt_off0000fe54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE54 10760 bytes
SHA-256: abaa69ecd1a25241ec9d3f0e6f2fc7e9ae65c3f53d7bdc7614663408da2381e6