Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca25fa54568f1293…

MALICIOUS

PDF

76.5 KB Created: 2021-02-26 00:02:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 2f83e5d13e503b9867cdffb09242f8e5 SHA-1: 427b8556c45d3e4a94dc141649195abde4952230 SHA-256: ca25fa54568f129365164b18d49e4762e8e15c5fffb30d10d8155d9a94dea477
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or phish for credentials. The embedded URLs point to various PDF files, likely serving as lures or further redirection points.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wb?keyword=man%E2%80%99s%20search%20for%20meaning%20by%20viktor%20frankl%20pdf%20download PDF link annotation
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/kowoti.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/xuwafurukimuje.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/fb79f22beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494674/normal_5fd91db4b80ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ff38bb9c2b73.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/iIhjha3/space_wallpaper_download.pdfIn PDF document text
    • http://nuvuzujujafusu.22web.org/project_director_job_description_template.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/poxexavenuzelebula.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/6p2geHr/global_war_on_terrorism_service_medal_eligibility_army.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/38fde.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/cb93e04b4.pdfIn PDF document text
    • http://fojozefamofu.22web.org/kupezowa.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/8546240.pdfIn PDF document text
    • https://sixalusizefew.weebly.com/uploads/1/3/1/3/131378898/tewebiki.pdfIn PDF document text
    • https://ziropiwos.weebly.com/uploads/1/3/4/3/134311351/luludowebejowimun.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/KhaGig0/16411313376.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/Oghjiih/sexually_transmitted_disease_infection_cdc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wififeju.atwebpages.com/panasonic_phone_kx_tga410_manual.pdfIn PDF document text
    • http://xoxemofunox.epizy.com/hodder_education_igcse_biology_workbook_answers.pdfIn PDF document text
    • http://jedigox.epizy.com/10152236879.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/tp_link_wr841n_repeater_openwrt.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_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 6084 bytes
SHA-256: 62a7887e84d5b05ea71376238cb81fc246d01258c20a0089dd6fd7b97bf7adb4
font_01_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 12888 bytes
SHA-256: d9cbf07fa5288e25b23027171f78146e3928b8c3e35d82d95921e3e2093f2162

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