Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd02425a78ecdbe…

MALICIOUS

PDF

77.4 KB Created: 2021-01-24 12:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b1f6de52142ec50d00aab069644e700 SHA-1: a1a83e1a979b0a345f416cfc8fe11539e8c238f9 SHA-256: cdd02425a78ecdbe77c1a77213d7dbf5b257a38c8651e4a4f5905fc2e5f871cf
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to search terms, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/aws?utm_term=hunger+games+book+2+pdf+google+drive PDF link annotation
    • http://femovanisom.iblogger.org/arcgis_10._4_free.pdfIn PDF document text
    • https://dekupepevimozis.weebly.com/uploads/1/3/0/7/130738652/paluk.pdfIn PDF document text
    • https://gonedosi.weebly.com/uploads/1/3/4/7/134730609/5a9cc.pdfIn PDF document text
    • https://varozowixofifop.weebly.com/uploads/1/3/0/8/130814066/7a6d553e14.pdfIn PDF document text
    • https://cdn.sqhk.co/rewufarelaze/PhcZyKL/xopadorufokekodanozozupi.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/5734208.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/tevenutubofofi.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/tenugew-gujajimila-nidinamizelel.pdfIn PDF document text
    • https://romizipomubem.weebly.com/uploads/1/3/0/7/130775952/7630365.pdfIn PDF document text
    • https://jakinazar.weebly.com/uploads/1/3/1/0/131070367/a39137cd4feb.pdfIn PDF document text
    • https://junalupi.weebly.com/uploads/1/3/4/4/134460459/4856078.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/ronatiduzoxij/annual_return_format_under_factory_act_1948.pdfIn PDF document text
    • http://dazesokagevak.rf.gd/aashiqui_2_songs_in_mp4.pdfIn PDF document text
    • http://tifureboriva.epizy.com/5879999326.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/wesoxurubela.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/rubowutifuka.pdfIn PDF document text
    • http://voniziveput.rf.gd/must_have_v3_worksheet.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_off0000f15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15E 5716 bytes
SHA-256: 2aeb98a1f624feaeedc9be62cb5ad726af542c1d31081c49cd997d4231d0fcf1
font_01_sfnt_off000104c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C6 10520 bytes
SHA-256: 3ad7e69205af263160ee0ecb1433971620bfb91113dd06bc124098affe39d712

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