Malicious PDF — malware analysis report

Static analysis result for SHA-256 efef36ea733eb436…

MALICIOUS

PDF

39.9 KB Created: 2020-10-15 18:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9ef31348ffd2bd3b8a4e411cb6f885a4 SHA-1: 0f3c8e616eed886da402e097145210908847b067 SHA-256: efef36ea733eb436c9df30cf311a2640ab57eb2fdea55628d04ea772d6133c22
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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://ttraff.ru/pify?keyword=dish+anywhere+app+for+android In PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/16c7aba32.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/zefaxit.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3029889.pdfIn PDF document text
    • https://site-1038794.mozfiles.com/files/1038794/15105155690.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/regomomidatapizumexowu.pdfIn PDF document text
    • https://site-1048515.mozfiles.com/files/1048515/rosuwuvuwi.pdfIn PDF document text
    • https://site-1043759.mozfiles.com/files/1043759/epsxe_apk_download_tekken_3.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/xoweril.pdfIn PDF document text
    • https://site-1039153.mozfiles.com/files/1039153/tanovasazadex.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/1/0486/9229/7878/files/ohio_star_quilt_block_sizes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/kipp_comienza_community_prep_seville.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3227/5865/files/77610881888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4895/5815/files/night_train_to_lisbon_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44e1f688-5382-44be-ba29-d8e7412a7d03/35595558500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7857c885-5f26-4f00-9040-ea952ecc637e/davotegeriwegonepavul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44fe3f2-0fad-42ca-8c47-228bb602a8f6/35961344911.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/833f8ea6-5fa2-4b31-aedd-38fa874c01ab/80234523734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31e7942-ecc6-4adf-9da6-5cc61d35c9b7/42628542998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a06a59-f435-489f-a4b2-d25e77223f53/83254044851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80251c1a-47d8-46d2-adad-ca2f44df8189/nowelumutaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d56ee29-7aa2-487c-9563-e7851deef49e/5117749057.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_off00005f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F51 5288 bytes
SHA-256: 0bc2ce79c1fe82c089f9eb42bc181e9e8ba8a1e2818e8833e082d7248de1103b
font_01_sfnt_off00007153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 9744 bytes
SHA-256: af7e50f4bad2ce6fe52382435b0d02734d84c4e6f465aead032edff79513e779