Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d5f40c0e0c83120…

MALICIOUS

PDF

89.1 KB Created: 2021-03-18 06:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 57e548bfd6a9857b8ee2a1787bd13961 SHA-1: c4c6cba93a92d4ecdd69319e085ea3c13734cee0 SHA-256: 7d5f40c0e0c831200bc04898f40a2351fdfde36afe1cdae3402b2659dae44c16
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, indicates a lure related to financial templates, likely to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://druttle.ru/123?utm_term=daily+income+and+expenditure+template+excel+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496014/normal_60354eb02f2c1.pdfIn PDF document text
    • https://verosogoteri.weebly.com/uploads/1/3/4/7/134738646/eccd877e23cb1.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuvapexal/hhgsLic/vutuvizigotoju.pdfIn PDF document text
    • https://vidiguwases.weebly.com/uploads/1/3/4/3/134347373/1340863.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_6011b6b899df4.pdfIn PDF document text
    • http://widusal.22web.org/45397835065.pdfIn PDF document text
    • https://ragajepegoxi.weebly.com/uploads/1/3/1/3/131379061/5245696.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/hdJRUib/diy_pennywise_costume_girl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_60471edc0997a.pdfIn PDF document text
    • http://experiment.website/dasikukawcdmc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448124/normal_6024f61f89289.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/juzakelel-ruzibovofu.pdfIn PDF document text
    • http://osthondroz.com/bemiwolwmx6.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/Vjgjjse/botomaxizebifajudubasum.pdfIn PDF document text
    • http://stav-games.ru/wuvobigamajigasolepesafit3y128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384316/normal_5ff7ab592a1b9.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/f99jhhi/kopugos.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/e9802600-cca1-4894-8092-fbaf6e87e8ac/suresavevawosulafogude.pdfIn PDF document text
    • http://zigonetisakep.epizy.com/site_reliability_engineering_workbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd87366-ead1-4a08-bed2-06fa57af4184/is_hp_probook_6470b_good_for_gaming.pdfIn PDF document text
    • http://lakiver.epizy.com/6753255335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453b02ed-157e-4641-8eda-b4d3c198195d/popolawupavurikidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759611d3-b7ee-4d96-b8aa-6a26a0f3077a/wibadowujewasodomopetaf.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_off000120c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C6 5292 bytes
SHA-256: 2ac820ace03e165f7a790e35187fcef7c4733d4ff14d6c966e2494388f1d7828
font_01_sfnt_off000132c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 10840 bytes
SHA-256: 2f76a9215c369d7813871fc3620023e389b32cf51b101604d688c8e6e8b075c3

Open this report in the interactive analyzer, or submit your own file for analysis.