Malicious PDF — malware analysis report

Static analysis result for SHA-256 df9d04991b70c3ab…

MALICIOUS

PDF

52.6 KB Created: 2020-10-26 06:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b15f815a3b5a3e9badd1d65e207ae258 SHA-1: b088f16f11de593b7c716c14e9f527e0b12d0e7a SHA-256: df9d04991b70c3ab53b78d48d7c5c2d5d95330cfff574506a57e4227fd1ffa79
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://cctraff.ru/strik?keyword=general+contractor+agreement+pdf In PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/3796637.pdfIn PDF document text
    • https://nosekuge.weebly.com/uploads/1/3/2/7/132740467/satumujifipavegowu.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/vesokipuz_judinenoni_mojosetula_powuri.pdfIn PDF document text
    • https://latijazaw.weebly.com/uploads/1/3/4/3/134312978/fe27c50.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/zumenaxaja-jivaj-giluvatuju-kimuti.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/lalalajusinop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f8cfdebc7920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_5f8b473a6f009.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/1/0435/6639/9647/files/19957184235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8934/7228/files/93891537881.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/bcom_computers_subjects_1st_year.pdfIn PDF document text
    • https://s3.amazonaws.com/sukedil/biometria_hematica_completa_valores_normales.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/beneficiary_deed_arizona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/72577455454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/rpg_classes_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/zizozelubogekogiwifojore.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_off000090d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D0 5328 bytes
SHA-256: d2ce0313abaa2755938598e6a418e273ffdb4e312c757e9efbf2290e14eaa854
font_01_sfnt_off0000a2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2DD 10160 bytes
SHA-256: 38a85d8dbaa02e0fad6f7bbf86647180b2bc60635274a11c6f315957a6d665f0

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