Malicious PDF — malware analysis report

Static analysis result for SHA-256 5530bdf49a0c911f…

MALICIOUS

PDF

79.1 KB Created: 2021-02-24 02:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 29887095f4c6e5312187fc95eac72a0a SHA-1: 94e034bad5cfcba77aa3b5dddea7f434c0c0b49d SHA-256: 5530bdf49a0c911f9cad689223dac06b0c3199edd4b86fa02b1f406d57605f75
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM firings strongly suggest this malicious intent. The embedded URLs, such as jottigo.ru, likely serve as redirects to malicious content or phishing pages. No scripts were extracted, but the overall structure points to a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=roland+vs+d50+vst+download PDF link annotation
    • https://tobalewaluwe.weebly.com/uploads/1/3/4/4/134437424/2d7e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_601e92823bd99.pdfIn PDF document text
    • https://sudarotabodubig.weebly.com/uploads/1/3/1/4/131407445/233a0f5b.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/b60c70e8e0.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/bifapadawinokif_dozifasumadefi_wimuwerixa_pekuwesaduzexiw.pdfIn PDF document text
    • http://natural-shop.info/tiwaga7fi0g.pdfIn PDF document text
    • https://vilawamilufulob.weebly.com/uploads/1/3/6/0/136006615/fuwepufaxagitedije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_60162a086586b.pdfIn PDF document text
    • https://cdn.sqhk.co/fovipobex/vidSXge/world_falling_apart_meaning.pdfIn PDF document text
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/pajasax_poxefurexoled.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5fd33f2eca860.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/fodijfa/buletabetarex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_60339acf147cd.pdfIn PDF document text
    • https://belonimilulufaf.weebly.com/uploads/1/3/4/4/134403367/de37c5.pdfIn PDF document text
    • http://straponartist.com/99352808611m82xe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roluvad.epizy.com/43483095433.pdfIn PDF document text
    • http://dofomexikokubeb.epizy.com/28338896750.pdfIn PDF document text
    • http://pafafobovixezat.epizy.com/geographical_coordinates_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 5148 bytes
SHA-256: 2b14af76e9a9a7a54af34e2fb7b49d191fc4a2f6c7ec7d4f83927518240b2e86
font_01_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 11820 bytes
SHA-256: 7fed37eb61db14ec79e15db066d86088b2b90637f145dfe024db4541c087c11e
font_02_sfnt_off0001186f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186F 16092 bytes
SHA-256: 2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140

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