Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f0a0c57053346a…

MALICIOUS

PDF

80.3 KB Created: 2021-03-27 23:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6d186ed99c4a46555492e29b14990c9a SHA-1: 383e6f44e573e3427dca1e062e6ae02f9ce409e2 SHA-256: 36f0a0c57053346a78571d500e099966f252fcbb068e94e562f4393cbaf4b301
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/aws?utm_term=carreras+para+estudiar+en+la+universidad PDF link annotation
    • http://mini-camera-super.club/anestesia_regional_y_anticoagulacion6dz15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_603b5229414e3.pdfIn PDF document text
    • http://epaytds.xyz/1373942166ryp3u.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/831229925711qjpu.pdfIn PDF document text
    • https://boretenewur.weebly.com/uploads/1/3/1/4/131453221/xiwovugatelekola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_605465a311df6.pdfIn PDF document text
    • http://my-favshopd.online/6109826457997alz.pdfIn PDF document text
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/8561831.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/9ae770c9-bda1-47ea-ba79-835fd5b747e1/fuzirowogikesovavowo.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/sony_str_dh750_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ab82f-ee88-4470-84a7-b22071266563/nigidatolipuruvawax.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/gokuxid.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/niveles_de_prevencion_del_delito_primaria_secundaria_y_terciaria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dcc0f86-9786-45d5-a69c-18ac2f4703ea/sword_art_online_order_of_shows.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/26164907768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb0f35d-b645-41a8-a5bc-ee115493c9bd/59463192474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9efbfb12-4fd5-4e4a-a262-03fcff6226dd/restaurants_near_the_standard_high_line.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c3a44ed-b24d-4b8d-b7cc-84c9703d4b1f/metesalomipu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0640a775-cd43-4919-a84e-1d89762633ba/simple_interest_worksheet_for_grade_6.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 4920 bytes
SHA-256: 544d18964c878b5d68d3fc2dba17f3ba99eca26ad2be784e463436ac02848c28
font_01_sfnt_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 11952 bytes
SHA-256: 227f39f5b20afa21a16e58539a072642de9382a79beacfb492a11eb7a215f9fc

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