Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf0257d259df6f2…

MALICIOUS

PDF

70.3 KB Created: 2021-03-18 00:37:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e7c8bf83ea27b98aee8caced3a588185 SHA-1: ae6d3d4caf527780b91036c6d30115500da668f5 SHA-256: abf0257d259df6f26f325c1a03ac8f28ee548ee4b55812365c5efc8f197c3b10
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The ML classifier and ClamAV heuristic strongly indicate malicious intent, likely phishing or malware distribution. The primary URL points to a search result page, suggesting a lure to attract users interested in specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=electron+configuration+ch.4+worksheet+answers PDF link annotation
    • http://bamirajewenexo.medianewsonline.com/kadale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481403/normal_5ff64f89731f6.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/jopimafex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403674/normal_6052052ccfecb.pdfIn PDF document text
    • https://resigigemi.weebly.com/uploads/1/3/5/3/135326159/kivuvororawujaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483624/normal_602dfb73537d0.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/add_and_subtract_unlike_fractions_worksheet.pdfIn PDF document text
    • https://vanixegufewip.weebly.com/uploads/1/3/4/5/134511125/xetozoxumabekatadovi.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/boxejeligum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495558/normal_5fee9ba8dd618.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/mesoperegojukepalajuxi.pdfIn PDF document text
    • https://xozejijijov.weebly.com/uploads/1/3/4/3/134315997/sawedizipolenox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475992/normal_5fe046f94566a.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/pavadilimatem.pdfIn PDF document text
    • https://tejemovifizak.weebly.com/uploads/1/3/2/6/132681066/1968776.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/bankersadda_current_affairs_quiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijuvewoduga.onlinewebshop.net/angaraka_ashtottara_shatanamavali_in_telugu.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_90002f07713442ad9bb0b70bf5a2086f.pdf?index=trueIn PDF document text
    • http://bawawajabatura.epizy.com/ley_de_ohm_y_potencia_electrica_ejercicios_resueltos.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_c12953cea9de4d6d9a4d1b5ee261367e.pdf?index=trueIn PDF document text
    • http://telijekiw.epizy.com/common_chinese_symbols_tattoo.pdfIn PDF document text
    • http://gonuvatujuj.epizy.com/72291707963.pdfIn PDF document text
    • http://novupomajanox.atwebpages.com/studies_about_english_language_proficiency_in_the_philippines.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_057adf9754ce4ca2a9602cf4b6c9c2ca.pdf?index=trueIn PDF document text
    • http://sijopar.epizy.com/15010523966.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_3839cb6f965746ceb9397100a245f87a.pdf?index=trueIn PDF document text
    • http://gefuwaw.atwebpages.com/what_is_the_babylonian_mystery_religion.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_fd855a4936f140299175a2bcaa6b8b8d.pdf?index=trueIn 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_off0000d5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CD 5376 bytes
SHA-256: 9730ede7b74b214c07f38aa56f55983f8d393cad26933bba5fd86d33d2f3d947
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 10380 bytes
SHA-256: bc96193603ccb68973675ff0e9c2983dc0f4255e10286590227b4c522d27ea16