Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ae357408c50d7d…

MALICIOUS

PDF

83.2 KB Created: 2021-06-01 00:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 58d30a8a218a1c1a9a1aa8a5c0315d6e SHA-1: c3750231245aec18e3c307bc732e6e2d41536679 SHA-256: 54ae357408c50d7de432fab00b64073db1f0053fa9fc6ef872b024f0d35e3608
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on `https://soxebez.ru/123?utm_term=san+francisco+bay+area+city+guide`. Heuristics indicate this PDF is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=san+francisco+bay+area+city+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5fc9190b6ef8a.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/lutuvapujijexula.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4416810/normal_60afec296e8c1.pdfIn PDF document text
    • https://nabumeludofava.weebly.com/uploads/1/3/4/3/134373896/8774413.pdfIn PDF document text
    • https://kifikutomile.weebly.com/uploads/1/3/0/7/130776046/zebek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_60212a697d3ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467945/normal_5fc5b5495eef5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5ffdcc36900e7.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/begurew-xemuto-ruvilonexubog-kexawulidow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_6046e0e13e170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403540/normal_6021a9ab84aeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ronuzexem.pbworks.com/f/25961772032.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/marag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be24fe4-1f0e-4be5-a85f-1d92cf18b419/the_explosive_child_ross_greene_website.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428454/bavasojedewukijaxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9cfb0b8-9351-4874-b9d0-93303b6bbc90/operations_management_definition_in_telugu.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/f/where_to_take_cars_for_simeon_gta_online.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144428448/kibepixawimomepopaba.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144414549/why_wont_my_indoor_tv_aerial_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5320012-af01-4b1c-b4b6-7a8db7bc23ea/old_fashioned_newspaper_template_google_docs.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/jorumamapajeliwazozidu.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_off0000fa14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA14 5384 bytes
SHA-256: 98df4c812ec66d1e514b4f809b5bececc170eab8bdccbd5dae3036be750b7a3e
font_01_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 10796 bytes
SHA-256: ba1a3509cd68ea836e67e548bfec15230759796a166bba5495c064f7b5d53d91
font_02_sfnt_off00013155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13155 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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