Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22d9fe0ec7bdf0b…

MALICIOUS

PDF

90.8 KB Created: 2021-05-17 00:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 726b833049b6443fedb210d149a168f2 SHA-1: 59946f3ff0b983f52c4bc6ff89803a692032c200 SHA-256: d22d9fe0ec7bdf0ba242891ccf2398fc76352035e6a087ed690184d96f207e77
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 0.9997

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://crophysi.ru/strik?utm_term=how+to+work+a+room+by+susan+roane PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453102/normal_5fde83bc5e439.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374835/normal_60068f029a375.pdfIn PDF document text
    • https://nivumumati.weebly.com/uploads/1/3/4/7/134703955/pudenujipijezi.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/jijitabawupaf-gitamowikaso.pdfIn PDF document text
    • https://xizenajagixofus.weebly.com/uploads/1/3/4/6/134657686/6465995.pdfIn PDF document text
    • http://devlp.club/tepuwagupenenurefutalutnpzpy.pdfIn PDF document text
    • http://gloslides.com/introduction_to_multimedia_systemsp4ayo.pdfIn PDF document text
    • http://lg-copyright.com/christmas_skits_for_church1hv1c.pdfIn PDF document text
    • http://zootime.store/zatanibipunfvdme.pdfIn PDF document text
    • http://weraka.online/doxitexoxetazokobukemhezs.pdfIn PDF document text
    • http://tiktoktop.design/mirro_pressure_canner_16_qtw22vz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ff6ace65c1e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470222/normal_6051e6b5cea5f.pdfIn PDF document text
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/zugewilaka.pdfIn PDF document text
    • https://nasuvanebi.weebly.com/uploads/1/3/5/3/135393195/9110898.pdfIn PDF document text
    • https://tepaxomiro.weebly.com/uploads/1/3/6/0/136019937/e748d080544f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/77373777043.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/25354312.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/what_paperwork_do_i_need_to_buy_a_used_car_privately.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/43948263092.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/zapevutasadupafavuviv.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_off00012569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12569 5160 bytes
SHA-256: 7f8f4b6e4ab761e76a54a511839f03d94b5464e7f58d24ce48d2331b031c25d5
font_01_sfnt_off000136f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F0 11356 bytes
SHA-256: d7211c866f777f5c7245821b0652a16f0124b9a4e6d8a3173d188f042dfb7424

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