Malicious PDF — malware analysis report

Static analysis result for SHA-256 267d81040e1b6016…

MALICIOUS

PDF

94.3 KB Created: 2021-04-24 17:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 70a86d2c762aabe2f79bcd70987017b8 SHA-1: 176d6d6a4997280157c156a0ca7a9a57410a54cf SHA-256: 267d81040e1b60161a3c64731455102c0b3024d2a04b8d80d6b4bba86440b6b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9948

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://zajinet.ru/strik?utm_term=plantillas+de+powerpoint+para+plan+de+negocios PDF link annotation
    • http://makamar.online/what_is_the_full_meaning_of_magus0exev.pdfIn PDF document text
    • http://mafuditovu.iblogger.org/18556797224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_60225b4fd18d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467975/normal_601968e2b2b33.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://misstourist.info/sipenokojamxgl5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427091/normal_5fcea33558721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_600b977cddc89.pdfIn PDF document text
    • http://igbusinessabouthelp.com/descargar_mecanica_vectorial_para_ingenieros_dinamica_8_edicionj9pik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5ff229b037f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_603d26dd326e9.pdfIn PDF document text
    • http://domavera.ru/fifatit6kg3b.pdfIn PDF document text
    • http://cosmeteca.com/kujazosehy5s6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_602f0af2c18d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482619/normal_5fc9c77352cb0.pdfIn PDF document text
    • http://freshka.fun/abbyy_transformer_12_fulldhk96.pdfIn PDF document text
    • http://romeita.fun/paris_casino_las_vegas_table_gamesabqu0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_604d7cfba5a9c.pdfIn PDF document text
    • http://xexatekuxid.iblogger.org/gegadowuxam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411245/normal_5ffc35b7acff1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448551/normal_5fc9a4844f58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_604e478f58b7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5feeb8c741d5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483097/normal_5fcb123a23a7d.pdfIn PDF document text
    • http://servisvds.ru/alfred_piano_technique_booksduo9n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://tepaduvofevog.rf.gd/python_3._7._2_for_ubuntu.pdfIn PDF document text
    • http://sibijexobesu.epizy.com/ratotugetemogepilitudu.pdfIn PDF document text
    • http://tuxefefili.epizy.com/verifivasuxadawogi.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 5332 bytes
SHA-256: 2145cfca4fcf343cd0bfa5e7bb7e54d826f2af450f8f5c1ddd2862d5e32fbc00
font_01_sfnt_off000133e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133E1 6044 bytes
SHA-256: f3eb3a0e1710f515ca9cd38dcabeb3096cefc027e036561f7564a9944ed0de43
font_02_sfnt_off0001437f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437F 11440 bytes
SHA-256: 14139833dc8f2520c5fcc0ced360efa1b5656817b3f957f1a4d480757076010e