Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b09e1e363bcc71…

MALICIOUS

PDF

92.2 KB Created: 2021-03-10 08:35:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 592493594e7d1d5230fc1e4d0c09c4ff SHA-1: dc9b9efd985581b4fc32526df88fdcf68be4c1e0 SHA-256: c2b09e1e363bcc71fe846325c6448e0caa032cf272aa3bf7094542f911f78dd1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://golowaki.ru/aws?utm_term=comparison+between+classical+and+modern+management+theories PDF link annotation
    • http://fordist.ru/bafodusatzyw3.pdfIn PDF document text
    • https://rerimewanuxo.weebly.com/uploads/1/3/6/0/136036548/622c150.pdfIn PDF document text
    • https://daxejinuvu.weebly.com/uploads/1/3/4/6/134645798/kajija.pdfIn PDF document text
    • http://airbin.top/cisco_4742hdc_installation_manualw1b3j.pdfIn PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/jaxabelupexip.pdfIn PDF document text
    • http://momentshop.space/73710725878y056c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_6025f4ef5ddd3.pdfIn PDF document text
    • http://ukranews.site/zedozem56lsj.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/d7a4c84cd1895.pdfIn PDF document text
    • http://instapriz.site/launch_federal_credit_union_south_daytona_florida7eeyj.pdfIn PDF document text
    • http://daating19.site/ryobi_table_saw_stand_diylmhf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5fdb2102d1c5d.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/vapulavi_gariterar.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/2d602006-8ebf-4565-b5fb-b03b53671735/xesomupopupukes.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/assets_and_liabilities_statement_format_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abff6986-44ee-4dee-ba58-302b5e956e9c/rigozapo.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/pipapogan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b8eaeb-2de5-4283-865d-b83283047d8a/resumen_del_libro_desde_el_jardn.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/coloring_fruits_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/how_to_draw_a_3d_house_step_by_step_easy.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_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 5624 bytes
SHA-256: 26f74ad34546e88319fce7a09c07f6450422f3f178a7990d8ff880b3090b3992
font_01_sfnt_off00013e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E65 10692 bytes
SHA-256: f1a6dc0906c09d4226a4c23e2e192e678118b2ebd5164861dee3f17e95be35a9

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