Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e4be079615b643…

MALICIOUS

PDF

67.8 KB Created: 2020-12-21 06:00:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f9cf6674257dde484e49de946fca1a8c SHA-1: 02c0a9d2d8fcbe5a79721302c173f6a993d226d3 SHA-256: 48e4be079615b6435f8be7cb4106f4f8c8dd8bd728b609ae6b241e9f8c4dc06b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a 'utm_term=minecraft+pocket+edition+servers' parameter in one URL indicates a lure to attract users interested in Minecraft. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/strik?utm_term=minecraft+pocket+edition+servers PDF link annotation
    • https://miwejezapelo.weebly.com/uploads/1/3/4/3/134342363/7490463.pdfIn PDF document text
    • https://pulipelese.weebly.com/uploads/1/3/4/6/134686308/c543f08e54bc8.pdfIn PDF document text
    • https://juvarefuj.weebly.com/uploads/1/3/1/3/131398009/lukejimaped.pdfIn PDF document text
    • https://jevusesapa.weebly.com/uploads/1/3/4/7/134765100/574cfe8d.pdfIn PDF document text
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/sulizerunubawe.pdfIn PDF document text
    • https://wulukapuw.weebly.com/uploads/1/3/0/7/130740123/raxotolirip-xenegez-jadone-lubada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e72e833a-0938-4c2f-8b74-fdca31249a1d/parallel_myths.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/68075637408.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72f627fa-37d3-4da3-b8fc-99be39600592/conversation_with_mani_ratnam_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/55679188140.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc109f45e8e827d428e9438/t/5fccf306662d5e24e0a36a83/1607267079297/into_the_dead_2_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0BF 5244 bytes
SHA-256: 45a97ef01596695805cb8676afeb3c601eb25a5a4146a8e98da1d99f12a47ee9
font_01_sfnt_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 2512 bytes
SHA-256: 085f322c79513b4895e6b5ea00a972e94223ad8acbe441c73456139a31bca323
font_02_sfnt_off0000dda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA0 10568 bytes
SHA-256: 2401bc52543e591cfb6a446415b926a76a73b6b288d527748e5709159128de8f

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