Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec10975e0d3c753d…

MALICIOUS

PDF

77.5 KB Created: 2021-03-10 02:48:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b74db8ce47aaba0f210910edd9b96ebd SHA-1: a516a7ca3b0a8a4ab3d8834fbe8b318be3ada480 SHA-256: ec10975e0d3c753d5a3df21fda0e0c78036800a697deea5f71809857c1c10b76
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gimoguvi.ru/aws?utm_term=mcgraw+hill+my+math+grade+3+teacher+edition+pdf PDF link annotation
    • https://dadojunolibete.weebly.com/uploads/1/3/2/6/132683289/1561803.pdfIn PDF document text
    • http://openchambre.xyz/sandisk_clip_jam_batterygq070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491157/normal_5fe938dd0bc33.pdfIn PDF document text
    • https://navolujute.weebly.com/uploads/1/3/1/4/131483334/xijawidof-zavubiboziv-dozupupiro-bukinoguku.pdfIn PDF document text
    • http://pycnidwzxc.info/28093707741ij1bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471464/normal_5fed769cc348f.pdfIn PDF document text
    • http://wogedebepodev.22web.org/galebiranasum.pdfIn PDF document text
    • https://mopamosaxute.weebly.com/uploads/1/3/5/3/135322262/lumomebiroxa.pdfIn PDF document text
    • http://idealicaitalia-oficial.site/elementary_my_dear_watson_periodic_table_worksheet2ay98.pdfIn PDF document text
    • http://2022god.com/4687664163286xga.pdfIn PDF document text
    • http://xewuxufulizifu.22web.org/engineering_leveling_guide_1-_375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_602ce04e5b0a5.pdfIn PDF document text
    • http://byseles.xyz/clash_of_kings_game_guideznz9y.pdfIn PDF document text
    • https://rawekawus.weebly.com/uploads/1/3/4/4/134467784/revufokotadod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477183/normal_600682aa68625.pdfIn PDF document text
    • http://ag-management.space/screen_recorder_android_note_9cniuf.pdfIn PDF document text
    • http://cmb-accueil.com/molazifi0k0zw.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/3091915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://621cd70f-1aca-46de-91df-1bd8162c3e90.filesusr.com/ugd/9f1ad6_c8eb4fbbb4dc4992b038d388206ef09c.pdf?index=trueIn PDF document text
    • http://vifebekomese.rf.gd/autocratic_leadership_definition.pdfIn PDF document text
    • http://xobubujek.epizy.com/oxford_advanced_english_dictionary.pdfIn PDF document text
    • https://2987c0f4-171e-4473-b3f1-a5468658115b.filesusr.com/ugd/75ff8a_1d8a27a6250043f5979d7efe18e18d7e.pdf?index=trueIn PDF document text
    • https://7afd96e6-4611-46d4-9b98-d111b897c281.filesusr.com/ugd/154221_5aaacab0abcf4745b2c9b7af3c77a509.pdf?index=trueIn 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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5752 bytes
SHA-256: ab28b895b84ff65903f9290dc99d397ef2834f66d1e709753d3f9a691d04d0dc
font_01_sfnt_off00010395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 10624 bytes
SHA-256: de3169ccf2436e4e8af4977ac684c9cde8748188e0c4053702bd1bc374402669