Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a5d56017360ea2…

MALICIOUS

PDF

70.5 KB Created: 2021-05-31 21:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c33b852936d21792f8321f61dcf2f6e0 SHA-1: e35db2dcc77136419a8fa6c53b3b0b52243238b0 SHA-256: 07a5d56017360ea281929c0f6a09a435dcd918fa937e9437e941dca7662c122e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. Heuristics and ML classification strongly suggest malicious intent, with ClamAV identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall structure point towards an attempt to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://fokemale.ru/123?utm_term=hello+brother+movie+whatsapp+status+video PDF link annotation
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/jeguligitemumasexepi.pdfIn PDF document text
    • https://rebanurox.weebly.com/uploads/1/3/4/4/134490941/1523662.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/29410.pdfIn PDF document text
    • https://kazenatujexisof.weebly.com/uploads/1/3/1/6/131637291/6967a2f82.pdfIn PDF document text
    • https://nidozasa.weebly.com/uploads/1/3/4/6/134680612/folerigusebekifaru.pdfIn PDF document text
    • https://diporatefumidal.weebly.com/uploads/1/3/4/4/134489634/3334519.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/jabesavomuxudok.pdfIn PDF document text
    • https://tavovoxiwazufaj.weebly.com/uploads/1/3/5/3/135325502/zalexawigefir.pdfIn PDF document text
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/nilediwa.pdfIn PDF document text
    • https://gugukipibedi.weebly.com/uploads/1/3/1/4/131438190/kuzeb_tegatefetagomok_mokeradon.pdfIn PDF document text
    • https://modezajuv.weebly.com/uploads/1/3/4/0/134097040/5909023.pdfIn PDF document text
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/bopakaraz_gufijaxuraxa_xagoz_jonefemabem.pdfIn PDF document text
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/nejivuxiderew_wiwuvow_fizaragewedi_zedikaxuxit.pdfIn PDF document text
    • https://levevuwakute.weebly.com/uploads/1/3/4/9/134904524/1bd1256.pdfIn PDF document text
    • https://tapukupe.weebly.com/uploads/1/3/4/7/134717462/88d4f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wemekojezum.pbworks.com/f/sizukinuvejekum.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144415500/bank_of_america_mobile_banking_app_apk.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144422991/bahubali_3_movie_download_in_hindi_hd_720p.pdfIn PDF document text
    • http://tagexoba.pbworks.com/f/25000109230.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144416577/night_owls_de_jenn_bennett_sinopsis.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144412710/ejercicios_de_quimica_alcanos_alquenos_alquinos.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/ea.com_unable-to-connect_madden_21_pc.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_off0000d5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E6 5452 bytes
SHA-256: 032a09fda47c08b1254eee4303ad60b2debe1787143a117a11d84e24f3e87416
font_01_sfnt_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 10628 bytes
SHA-256: d3a24de958ac1fe72bfcafd91cacbbb894ea73e4accafb402308d0d8a79c5806