Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20a94a81d4307c8…

MALICIOUS

PDF

78.9 KB Created: 2021-05-09 05:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5711711ae9520d471f4eb719d5ada0e3 SHA-1: 332aa1b6c1f99cf8ad30adef75b75156b6fa559a SHA-256: e20a94a81d4307c8d57db426fa18063e7140beb15ffac936bc77e7e21c6e2f3e
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised with a product search term. Heuristics indicate this is a malicious redirector and a link farm on disposable hosting, strongly suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to lead the user to a phishing site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=zoom+g11+guitar+multi-effects+pedal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4482418/normal_602f08e648d22.pdfIn PDF document text
    • https://jeduwisuduxib.weebly.com/uploads/1/3/1/4/131483356/xinaloxikesititi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_604364f8b4b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_600d9b4d9605d.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/iThbLii/98573725961.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/gabix.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/pulatenuluvisu.pdfIn PDF document text
    • https://xaporavuxeboj.weebly.com/uploads/1/3/2/6/132695407/e9e23c1.pdfIn PDF document text
    • https://lomepulovu.weebly.com/uploads/1/3/4/6/134654159/3702653.pdfIn PDF document text
    • https://cdn.sqhk.co/wefonasifaza/QuRuhcR/vabam.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/fGhgYpb/91782911170.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/pibabopuduj/71344383135.pdfIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_4cf2a90c23834bfab12356323dbd77b3.pdf?index=trueIn PDF document text
    • https://81d89a68-18ac-4cf1-ad00-ddd5d2f7da41.filesusr.com/ugd/ed58ef_86f7b50599e24b3fa7ecfcf68ecca158.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cb9d09-5374-4a4d-9701-ee812631d455/mepemimipufizopajos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65a49c6d-e39e-46b8-957b-826dba525034/how_do_i_get_directions_in_google_maps.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_25085598782b4f37960dfcfe014abce5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/fotujil.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/jasper_reports_alternative_php.pdfIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_45ce9d2899e14a76a7f4c06254da34c4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc8f695-7986-4c56-a3b4-ce4f9a7e506f/is_electricity_cheaper_at_night.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE22 5516 bytes
SHA-256: 6c030882845da8f18b7cbcf2493c7adf1b4426784b23084ddeed60f751586acf
font_01_sfnt_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 11580 bytes
SHA-256: d9668ad4e13b9e998b075583053141d0931f46f921a10627ce3d5cf9006f73f5
font_02_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e