Malicious PDF — malware analysis report

Static analysis result for SHA-256 75b6da156e8a0fac…

MALICIOUS

PDF

41.7 KB Created: 2020-10-28 19:51:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a4279e15c8f4c214d1721f13f852afa5 SHA-1: 5c8aae851d0998b746f88a24d537daf2b329cc79 SHA-256: 75b6da156e8a0fac7bd450cf83dde3f9c61456230e32a1188eac1dc59749f4f7
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.me/123?keyword=theory+of+the+novel+a+historical+approach+pdf In PDF document text
    • https://davijoxo.weebly.com/uploads/1/3/4/3/134357566/1936a7dc8ac201e.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/nizux_lamezo.pdfIn PDF document text
    • https://rokejowavati.weebly.com/uploads/1/3/4/2/134265467/1926099.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/08e194ef7696ae.pdfIn PDF document text
    • https://voganolov.weebly.com/uploads/1/3/4/3/134372868/rifamokuv_rusewubawir.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/wifanofomur-bewajerilejapit-ziriroza.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/gobuked-nerenuruzu.pdfIn PDF document text
    • https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/7ba69.pdfIn PDF document text
    • https://judiwufafa.weebly.com/uploads/1/3/3/9/133999980/3040289.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006445.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006445.bin)
    • https://s3.amazonaws.com/xamibudasagas/present_indefinite_tense_practice_exercise_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9051/9221/files/xiziwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9002/8960/files/63634000082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9159/8754/files/snapchat_apk_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/zebasekerovepusox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2653/3528/files/65623996226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab0a798-021d-4533-bd8b-85a54cfa4eba/deus_ex_mankind_divided_all_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8115241e-5151-4dec-ac0b-caa302b4ddf9/jabifefikezowivobaguwato.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/sobepevumifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4283/1522/files/77980694924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b44406-dd7b-446e-bd4c-19b1c84dcbc1/sidoridurilos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5617c21b-84c6-4840-9284-90df1e7bdd56/wodenajusanilemevavib.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/xotapogojovabobuwef.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 extracted file (font_00_sfnt_off00006445.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6445 5352 bytes
SHA-256: 0a7efaa6c179f79321a2336a16382248de648fa51becc4740e9ea9e388fb053f
font_01_sfnt_off00007682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7682 10504 bytes
SHA-256: 80ce42e2a84f8e2213ab3397d5a913f507095b4be42e8e386383f9c73f04e598