Malicious PDF — malware analysis report

Static analysis result for SHA-256 d982ba899925d99a…

MALICIOUS

PDF

71.6 KB Created: 2021-06-14 22:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f46c1116751b9ed895125dde5599f224 SHA-1: 57a06cd6264f223c992122f62bc667a107f528b8 SHA-256: d982ba899925d99a3cdaef516126db214b27c58c50e2e267567eba647d5da6ed
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results or redirect users to malicious content. The embedded URLs and the document's structure point towards a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://medvor.ru/pbw?utm_term=apps+to+chat+with+random+people PDF link annotation
    • https://lubumona.weebly.com/uploads/1/3/4/6/134648672/rizisulufodumuwopi.pdfIn PDF document text
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/4794e40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_606c053c619a2.pdfIn PDF document text
    • https://pisolani.weebly.com/uploads/1/3/4/6/134668870/vazavem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_6063a174c606a.pdfIn PDF document text
    • https://fovivijidilel.weebly.com/uploads/1/3/4/8/134888041/6595529.pdfIn PDF document text
    • https://foxujutuz.weebly.com/uploads/1/3/4/3/134348357/zabalikizik_ludemazoku_mepan.pdfIn PDF document text
    • https://redikuvemezu.weebly.com/uploads/1/3/4/8/134872152/wewutofuto.pdfIn PDF document text
    • https://zemojedi.weebly.com/uploads/1/3/5/3/135333580/e6c2f5481f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389582/normal_5fec9c95a06a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_606ad18403b03.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/7164a637-69dc-47fe-92f8-b422b77a5e2e/zewunazagixaludotegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4faaa03b-6e3c-45de-82cd-97a5bf37a9e0/mevobubusisumamijada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c44740-c886-4aaa-ae38-bada463f4f8c/vimetutikunomilufifute.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144704652/suicide_squad_joker_songs_download_mp3_zip.pdfIn PDF document text
    • http://sulegiwi.pbworks.com/f/vejiwawejamozidogidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905b0e7a-7a1a-46e6-92b5-dac6553d4a2a/regate.pdfIn PDF document text
    • http://noxiwako.pbworks.com/w/file/fetch/144524388/root_words_worksheet_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd9523f-7fdb-4b7f-8bdb-1d164ca6365d/gevokeduzim.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144908055/x_force_autocad_2018.pdfIn PDF document text
    • http://vamafob.pbworks.com/w/file/fetch/144662808/wibotarosewe.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_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 5396 bytes
SHA-256: 332d031d37980a38e6f9f61ce5c8f3828f09e86059e945e3938364c7c93638ed
font_01_sfnt_off0000ed39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 10496 bytes
SHA-256: 768f5ea952f4c0e04d4ceb4ec566f2e5875896ea1ad72ea39774a5d299e389c1