Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce083dee1e4e66fd…

MALICIOUS

PDF

80.5 KB Created: 2021-05-09 18:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c10c8bbc8359d73fbb559f28e3af46be SHA-1: 86f1dc81f9dfcc8eab3f29c2fe166f9caa4a5c5a SHA-256: ce083dee1e4e66fdda4d8baa22852a2bc3ef6a3f97153e12de7e7206199273aa
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically crafted to appear as a guide for factory resetting a Motorola phone, which is a common lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the high ML score indicate malicious intent. The ClamAV detection confirms this, identifying it as a phishing trojan.

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/strik?utm_term=how+to+factory+reset+my+motorola+phone PDF link annotation
    • http://fb-ig-copyright.com/dazalutifapinobunifizupo8vho6.pdfIn PDF document text
    • http://wonder-ita.fun/how_to_get_gold_wyverian_printrzymd.pdfIn PDF document text
    • http://pojokup.getenjoyment.net/rimapogovafiva.pdfIn PDF document text
    • http://devlp.design/jozijipowojowobofi702cn.pdfIn PDF document text
    • http://barberking.best/2002_ford_explorer_repair_manual_download_freejshhb.pdfIn PDF document text
    • https://vaxevadokipab.weebly.com/uploads/1/3/4/6/134610393/rudixuzas_momedubudopivi.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/brother_pt-h100_label_maker.pdfIn PDF document text
    • http://wuroguredogir.getenjoyment.net/68095677167.pdfIn PDF document text
    • http://reliables.ru/artemis_fowl_the_time_paradox_weeblyjr8jz.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/6293366.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/26146007226.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/zulafasifedilizifuwudeto.pdfIn PDF document text
    • http://lafutib.sportsontheweb.net/baliza_passo_a_passo.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/ledofi.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/3ba1f169-6339-43aa-8736-c31bc545879d/my_passport_ultra_wd.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_34cd94024388448896dbbe0b594b4af1.pdf?index=trueIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_eb7ce170384f41d39a86402d105b3dae.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0073220-87c9-4822-94be-8cb0aa380433/who_was_born_on_july_22_1978.pdfIn PDF document text
    • http://najukelosuned.myartsonline.com/acidic_oxides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1dc7ca-fad6-4c3c-9fbc-de9475e28b59/what_size_needle_is_used_for_insulin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccdd4c59-04f6-4e36-af45-d5215c0fbfcf/marathon_wr50m_watch_strap.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_off0000fd46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD46 5408 bytes
SHA-256: ccb29f8b5a51d1e49113602868cffb84895bcdf08687428efec4f636b9ec2eff
font_01_sfnt_off00010f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9C 10860 bytes
SHA-256: 835eab810f8372af3c0965d10bb714a3da7ac2b3bb5999892a349d7377f6db88

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