Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6501b4d841a90f…

MALICIOUS

PDF

128.3 KB Created: 2021-03-24 08:45:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d7cc19889491f2cb8153cf0ed4e31ea8 SHA-1: 553561ddda5727fb909ac1567938868a777469ec SHA-256: 6f6501b4d841a90fed5e48837e8e327d702df8f6c312bfe8547bfc53b0e0304a
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://gimoguvi.ru/award?keyword=bulthaup+b2+pdf PDF link annotation
    • https://mudufisapegew.weebly.com/uploads/1/3/6/0/136097401/2343779.pdfIn PDF document text
    • https://gisafumeg.weebly.com/uploads/1/3/6/0/136098567/2248582.pdfIn PDF document text
    • https://nudabixe.weebly.com/uploads/1/3/4/5/134505388/nososasif.pdfIn PDF document text
    • https://vidufatow.weebly.com/uploads/1/3/1/4/131438098/vubobazepolo.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/memopinowofuwasijo.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/zoxexalef.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/texas_instruments_ti-30x_iis_solar.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/sojofo.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/8d6a5c.pdfIn PDF document text
    • https://jikesisepam.weebly.com/uploads/1/3/1/4/131406861/zaxumexirepero-gesiwovaxapodo-tatasare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a5bfc55-71df-4474-8f3e-9f6aca65c64b.filesusr.com/ugd/29b6ce_d4d0c9651ef747499964bb3eb303f81c.pdf?index=trueIn PDF document text
    • http://kemesid.onlinewebshop.net/wedurepujijesafagojemovu.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/missguided_us_discount_code.pdfIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_99fbf2518def486588c04a01c0835060.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1629ec-2010-49e1-96f7-85ca997be7c2/zaxazokorewoxagola.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fotulim.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/best_android_mobile_phone_under_15k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/161ebc26-756b-4905-b346-858ce93175a3/48418814315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/465a5bea-0f3e-4573-ac29-baf34bdc205f/ielts_general_training_writing_samples_band_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03986ad5-1d36-4212-85fe-f6c099fce9bd/71171025354.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_off0001b63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B63D 5176 bytes
SHA-256: fb600d0ae5865a0928bf82bc75c5df23cc946322431340dd42d1e99218cb6fcc
font_01_sfnt_off0001c7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7D8 13376 bytes
SHA-256: 46d0dadf54eeb1809ef9e6bc5b25e74c11fbb1d707206c490a80404293b58d60

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