Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a34c897b88fba61…

MALICIOUS

PDF

88.2 KB Created: 2021-04-07 05:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a45eca9543ec9af5e523fe316463b4d SHA-1: 889eeaf4ccbb28a3f33ac83923f44567434be507 SHA-256: 3a34c897b88fba612d87dccbdec512b65c1015854ec8f56bb24a83d497112fd8
156 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 0.9996

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 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.
  • 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://jumiwimov.ru/strik?utm_term=where+to+buy+greenworks+tools PDF link annotation
    • https://dofedexakupular.weebly.com/uploads/1/3/4/3/134317333/dipodisegup.pdfIn PDF document text
    • https://wetikifavuzimol.weebly.com/uploads/1/3/1/6/131606122/59c757737465ad.pdfIn PDF document text
    • https://pisisixiva.weebly.com/uploads/1/3/1/6/131636779/jimexupojasukedesed.pdfIn PDF document text
    • http://kmplitka.shop/what_is_code_b200_on_canon_printerw0dnh.pdfIn PDF document text
    • http://eushopvmn.site/40216580298wrpyy.pdfIn PDF document text
    • https://kepuromoru.weebly.com/uploads/1/3/4/9/134902866/e24376267078e.pdfIn PDF document text
    • http://hurleyshamburgers.com/clinical_cardiology_made_ridiculousl9npxe.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/jThsge2/run_fast_run_hack_apk.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/vatogusaxixaj.pdfIn PDF document text
    • https://cdn.sqhk.co/dexizajifu/bLGPhjl/26067278553.pdfIn PDF document text
    • http://mainsale.pro/4703073699xc99a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496148/normal_5ffe1cef97daa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478133/normal_6060bb56d2fbc.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/kotodur/mah_bed_cet_result_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/qu_significa_fotografa_area.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/writing_linear_inequalities_in_two_variables_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/25857903455.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/whirlpool_dishwasher_wdf520padm_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/advanced_russian_grammar_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/bitdefender_scanner_free.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/57486081663.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_off00011b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3B 5148 bytes
SHA-256: 215dfd1ba49cf01816e7e58013f1cb50c1c26788585e429abe314d079b4a96fa
font_01_sfnt_off00012ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE1 11264 bytes
SHA-256: 5be354b0e0e545665cf37cf80294fc4786a5555bbbf2570fa01c7f09f53b887f

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