Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56ba50916977083…

MALICIOUS

PDF

88.4 KB Created: 2021-03-24 18:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3994337893a67fbe5fd7b8214a8f6a71 SHA-1: e70856c2c686aa0b3c0e547c76713383a1816d4b SHA-256: f56ba50916977083b856af287bf6d6669e56cceec93e90658fb29e807f27a469
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/strik?utm_term=brother+p-touch+pt-h100+handheld+label+maker+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426257/normal_5fe06d22322e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_603bfe7100404.pdfIn PDF document text
    • https://kasasifu.weebly.com/uploads/1/3/4/6/134697732/3380656.pdfIn PDF document text
    • https://lodipututu.weebly.com/uploads/1/3/4/7/134765193/ledepomefewege.pdfIn PDF document text
    • https://wexivupesowapab.weebly.com/uploads/1/3/2/7/132712225/2c2a1.pdfIn PDF document text
    • https://dofigova.weebly.com/uploads/1/3/0/8/130813881/jufefugixipabekit.pdfIn PDF document text
    • https://gidorimafemona.weebly.com/uploads/1/3/4/8/134867851/juzumukidawiw.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/0jhjgcV/hover-_1_titan_electric_scooter.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/dojafuzit_naxematuna.pdfIn PDF document text
    • https://pevigegokepos.weebly.com/uploads/1/3/4/3/134366184/kasarabunezumo.pdfIn PDF document text
    • https://bipinudaw.weebly.com/uploads/1/3/4/7/134718108/soluxekuz-pomir.pdfIn PDF document text
    • https://cdn.sqhk.co/fabukujeb/hiKMB9F/piwabanuxafutujixi.pdfIn PDF document text
    • https://xafosaxit.weebly.com/uploads/1/3/1/8/131859261/gokidisize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_6041de649d605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_602ac260b0126.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/K4Umvhd/84460579713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391909/normal_6037f818ee8f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_8817f58c56a04837993d8f19c34f7964.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa30ea5-6cc9-4c17-ac65-66ad3b6deeb7/gufuzawigamap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e2c39a-adf2-4456-b784-104c9a56a063/3612632581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3116fde9-0678-43a4-99c1-619f6cc52c5c/brother_dcp-7065dn_toner_walmart.pdfIn PDF document text
    • https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_9575ee9b1d3341f687915da27fe11e1a.pdf?index=trueIn 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_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 5612 bytes
SHA-256: 933327212217efb38e272397789eb17415ebc68453e1402fb17a9bb6c76f6447
font_01_sfnt_off0001144e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144E 12428 bytes
SHA-256: dbec95c4c68c36c10c4dbee84af1a4d6dcb7d308f02fb124afc9887581f1624f
font_02_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e