Malicious PDF — malware analysis report

Static analysis result for SHA-256 15618504ecdaa69c…

MALICIOUS

PDF

74.7 KB Created: 2021-02-23 02:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 74d20dd897b405aa4d52f8631c22c2ff SHA-1: 03625def947425ff2dc417621c82d24e99fbc13a SHA-256: 15618504ecdaa69c020b8f3030e78e254219c9c5699cb8ebebd6746edb1680c4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, characteristic of a link farm or phishing campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier strongly indicate malicious intent. The embedded URLs suggest an attempt to redirect users to potentially malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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/strik?utm_term=rode+videomic+pro+gopro PDF link annotation
    • https://gubulugovidenu.weebly.com/uploads/1/3/1/4/131406252/8deb7.pdfIn PDF document text
    • http://tk-time.site/459456565466estk.pdfIn PDF document text
    • http://xekuluw.iblogger.org/what_is_the_moral_of_the_cyclops.pdfIn PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/862ddd5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_5fd12a1a83bf9.pdfIn PDF document text
    • http://invitesistem.ru/vexitawajitukidivi789z.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_601489eb39328.pdfIn PDF document text
    • https://rijesire.weebly.com/uploads/1/3/0/8/130814070/xuremajimi.pdfIn PDF document text
    • https://xitukamobem.weebly.com/uploads/1/3/4/6/134643312/5373563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fe5548b6b518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454999/normal_602537fccb820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380088/normal_5ff2ac7e47aee.pdfIn PDF document text
    • http://teksalle.xyz/vegan_recipes_breakfast_easyqxrsa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/wibosupipepigoxulorok.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/internet_speed_test_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/58811046942.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/yoho_national_park_weather_report.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_off0000df14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF14 5040 bytes
SHA-256: e3da1f40de069dd1151a77d90ca854d13ed6a8a0091865e8e36cd9760ee8cae3
font_01_sfnt_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 14668 bytes
SHA-256: d713c96e53723e966d34941ee50cd2c7fe3487cc358f78795621e5f8c00de9d9

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