Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c769271e433b8d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-15 10:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34e080cca4f8eea6bb108e1dec5371bd SHA-1: d3be882fa9e985ac54392fc5ab8a093a231ccd87 SHA-256: 09c769271e433b8df6ce3b3a876b97441ae2ff7988d8865512725633d5e3106c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan PDF. It contains numerous external URIs and link farms pointing to potentially compromised or disposable hosting sites, suggesting an attempt to lure users to malicious content. The PDF structure and embedded links are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=vlookup+step+by+step+pdf PDF link annotation
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/furawokakazevinizonakodol.pdfIn PDF document text
    • http://atya.eu/files/file/81429259262.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/16570301520.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0a415d1e7---19906464508.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/82980146196.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/jawilaf.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/tepefe.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/30229845550.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/76891614930.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/rifikadeduta.pdfIn PDF document text
    • https://lasanisports.com/files/51516214467.pdfIn PDF document text
    • https://flexi-cms.com/uploads/file/39677810941.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109032328302730.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///29441986955.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/pejovapem.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/jusopaj.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/userfiles/file/vuzikakokapegipuvi.pdfIn PDF document text
    • http://sswjeans.com/files/nobekawojodomerojotoru.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613246bb3b13b---83801033336.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/ziwap.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/dilifomozabuwaxogakawezox.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/83673727525.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/gedoxoxemunaxeperokaf.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613156f79aab9---rabinivadezewatufaximuri.pdfIn PDF document text
    • https://aramlasmerok.hu/uploads/file/farofagirumugubewu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 10448 bytes
SHA-256: afe1edc93d3933dcd5514a26b4c967f2b406a86c1cb78a451ef1577cae4d1d14
font_01_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 18268 bytes
SHA-256: ab7aa1e8e07cf56121b5255de08de291d09c4b8767e1c842bcd5648a6d2e0204
font_02_sfnt_off00012c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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