Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7ed2fa24161400…

MALICIOUS

PDF

77.1 KB Created: 2021-03-24 15:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 672a349c72e8f3799f440743d9072f61 SHA-1: 09974de9769fab3c89342ef29c620d606764634d SHA-256: fe7ed2fa2416140052a5ff30fad72ef954e8a9d49d9dd9f2225fbfe38593a2fb
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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://golowaki.ru/strik?utm_term=alpha+omega+elite+65+rear+facing+installation PDF link annotation
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/nikulurelesuzu-xajimubiw-fukesapadirovi-texaloro.pdfIn PDF document text
    • https://filekudop.weebly.com/uploads/1/3/4/0/134017403/xudotukegajuxudap.pdfIn PDF document text
    • https://tafebitekule.weebly.com/uploads/1/3/0/7/130776603/3162694.pdfIn PDF document text
    • https://wovufimi.weebly.com/uploads/1/3/5/3/135327312/sumepejisuve_juxinusibelak_kizodovaxupamis.pdfIn PDF document text
    • https://zupitexugavasol.weebly.com/uploads/1/3/0/9/130969618/zuzopa.pdfIn PDF document text
    • https://mibimosa.weebly.com/uploads/1/3/5/9/135959727/dobezozup_visobe.pdfIn PDF document text
    • https://giburonolunege.weebly.com/uploads/1/3/1/4/131406036/6b92e13f98.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/3a97066d-eff9-4826-b59b-ef1233d0188c/die_unendliche_geschichte_ebook_kostenlos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea831d2b-6300-46e7-90f3-e3b2f4bbe3fc/braun_thermoscan_ear_thermometer_with_exactemp_technology_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa657d41-4baa-4a05-8dc7-7bdda6b93558/pasufe.pdfIn PDF document text
    • http://vodukatova.epizy.com/51385757956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edee1371-2c2e-4206-9c8a-dad0997e6c23/kuverikorilobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6fc319-bc60-4c60-8f47-f12115144dc1/ginipofivaliweneweki.pdfIn PDF document text
    • http://potolonufe.epizy.com/tamil_news_paper_link.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2dbdbb-5037-4cbf-b77b-897adcdcc570/50375348175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57e0cbb-aa81-4df5-9951-03eb48485c2a/43910693744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1643c3f4-ef61-4f28-9a9e-195492e28353/the_exorcist_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53b6d12-e397-4429-9cd4-709dc2ff748e/watch_cat_in_the_hat_full_movie_on_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e3805c-741a-4a13-82c2-140326462409/aja_ki_pro_ultra_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30530758-8dc4-4a12-b9da-41fc6423d023/star_trek_into_darkness_khan_fight_scene.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_off0000ec4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4E 5696 bytes
SHA-256: ba711d2c3fe704041759cab22d96dd0b46708a259d6d5f623734b903f7273a0d
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 11216 bytes
SHA-256: 08ff0b1be4a988e7b3b437d50d3e64478ccffe2bb55646a02dae76c24f8f8d0f