Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fded294cfae31a9…

MALICIOUS

PDF

70.9 KB Created: 2020-10-15 10:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c5ec0fbc7c42e44a9d474fe40c357e0 SHA-1: 132a092f2231b522651e8e19149f8d96f96ed476 SHA-256: 4fded294cfae31a93b919fa6193f129089e6cc931dbbc65d977c2c7ba6b8fed6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/strik?keyword=overlord+novel+volume+1+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/vudodapazepipux_kijemomebegax_velagokotukif.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/rezewupiladu-ridumubumip-nutomixutuj.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://zavigajigufuf.weebly.com/uploads/1/3/1/6/131637719/jizitotevaw.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6150/1848/files/kiliwajusiribelosus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9047/1832/files/zisalarogivilividuradolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4475/5866/files/92376360128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/94050608774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0821/1619/files/pokemon_card_game_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d0c36b-9dd7-4fd6-a742-18f519711a84/8536060141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fc56979-c17b-4ab4-8ba7-18f15e5b3abb/44668677200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3034cbf5-885f-4c31-b724-2a3fe8e50ab2/zufuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6570c495-5d37-4eaa-a95a-a157845725af/rewukutonepajulepulukinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2372/0602/files/reddit_reader_for_textbooks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/11150991737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6310/5953/files/descargar_peliculas_de_antonio_aguilar_completas_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9233/6547/files/vokuwisujub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b3cc4bf-a722-42a1-9259-27be9076cd4e/60366431651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9503a1-1ae3-49e4-b4e2-14d6051399af/93261439143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52c4a09-b683-450c-894f-30030cf5839b/mafurax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2920f2-4199-4c6f-9b1b-bf1dc29522ab/fogebeduxosisot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2c23e1-cc67-42ff-965b-ca6b0378299a/wilamijazusoruviwumovev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df493e6-3c11-4384-95c9-7dd99b338642/dazezitoxeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a63323d-6411-4cb9-b556-ebbf758a375c/mozidofisajuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1713a8d-ae9e-4210-8ba3-4fee58f13e27/64188341180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338fc37e-2278-4530-9abc-16f666b780f1/98079777795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b59c00-5baf-4351-b171-0691b9005d67/210284703.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E0 19296 bytes
SHA-256: f7261c7bfd7928a875ac660b91b62bac1e6918be3c4944c6c8c1a3c8733ed601
font_01_sfnt_off0000d4dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DC 4940 bytes
SHA-256: a15e2a18b6a9b47f8cc578a22749398524321e234a76671430bcd1c349421fa0
font_02_sfnt_off0000e5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A4 11500 bytes
SHA-256: a2017f17852f3af273b998345525b66e32e9f2740400abfe7303bf8850f22902