Malicious PDF — malware analysis report

Static analysis result for SHA-256 4980115859f0514b…

MALICIOUS

PDF

86.9 KB Created: 2021-04-11 03:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 82f98feaaef022ce5681dca8eac7e185 SHA-1: 19a9c3150fa693f03458adc687b37ad130655704 SHA-256: 4980115859f0514ba328d7f171e4e40f0da56d2b834809162561c12d36f94c84
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/strik?utm_term=wilderness+survival+guide+book PDF link annotation
    • http://trudogoliya.online/honda_accord_2012_service_manualiy2iw.pdfIn PDF document text
    • http://datab.vip/xinadukowedumubilutifaname1mh.pdfIn PDF document text
    • http://arendaavto.taxi/pippi_longstocking_song_lyricsklnj0.pdfIn PDF document text
    • https://xiruzukigipimog.weebly.com/uploads/1/3/4/8/134865515/kakugotetiwe.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/1849637.pdfIn PDF document text
    • http://bigpleasure.ru/how_to_write_a_health_and_wellness_plangozav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447433/normal_60349f37ade79.pdfIn PDF document text
    • http://hookup673.site/spring-_framework-_3._0._5._release_freepp8ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_602d932e04c27.pdfIn PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/mafumorev_fexumusaxet_pabogarunodujil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_6065c84634a61.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/99da8255-7180-40f8-b503-f9197084be9c/we_dont_care_lyrics_demon_hunter.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/negubijanazufuwujisenivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03b3b2b-4522-437d-8c91-741ac11b3e25/12014549481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108dd0f3-070b-4354-b72c-1eca6dccbea1/goketugosekuzepuva.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/91017422114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98071e63-9c39-4ce6-9a71-41526426cf52/33826309864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ece6d8b3-b005-4c90-b74e-ce5a3dc43bc0/52406923828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b5c18c7-0e53-41d6-84da-945ea8a98fa8/sutemosaxijusirubizokosug.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/muscular_system_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b1b8ae2-db9f-4f4c-b93f-3da058bc91fb/latepe.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/grounded_theory_qualitative_research_method.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/107cfa45-f5ac-4d7b-b020-870c4102e0ec/runumalojivaweliwakige.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/suzozamapakamexunakak.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_off0001170d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170D 5268 bytes
SHA-256: 5468a0d4a472d5ad046d209a5b73e362e4da42e6d3344b2d36ef6386804c3c7d
font_01_sfnt_off00012915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12915 10800 bytes
SHA-256: 748591eaa91ca3599af1fb4cd8bb8d464625724b3cbad4450ef2bd8cdd5e36b9