Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d211d790e06fd2…

MALICIOUS

PDF

86.8 KB Created: 2021-03-16 19:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 5f2a1081e3c766e99f438cf908b502d4 SHA-1: 55cd238688be027afbc018a021484cd7b6e5d167 SHA-256: 19d211d790e06fd2f6b1aeafbf887ddcb09e636c00ab38cb6196b4d820d2403a
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 of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. The primary URL, 'https://jumiwimov.ru/wix?keyword=beyblade+burst+apk+play+store', suggests a lure related to obtaining an Android application, likely leading to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/wix?keyword=beyblade+burst+apk+play+store PDF link annotation
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/6406958.pdfIn PDF document text
    • https://taxinureku.weebly.com/uploads/1/3/0/8/130814469/ramofijunuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_60263bee0c78e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_602c8f3c8bd09.pdfIn PDF document text
    • https://dizegeduwawab.weebly.com/uploads/1/3/4/3/134374994/05f711c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497348/normal_5fde7d9dd627c.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/1e83f359504fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_603f7f11598e3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jezobasit/suninago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2c24ee-74f5-418c-88f9-3b44a20e39cc/full_stack_react_projects_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26e0d00-1e41-4178-a738-80178c8a0773/14152941810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9a184b-0fe6-467e-baed-6cc7796b662e/99397829422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f122d796-946c-4d94-a4b4-5ce4bab483a4/42543410824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec13a49-80f9-4d84-9980-5fa8e58451f4/50562791426.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/31087745795.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/27320758296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aece854-5f5b-4c9c-8b81-6464338f23b9/rizozuduf.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/46414443306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee060df9-d7a7-4070-aa4b-3a5733f5e810/navy_diving_suit_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/12113082960.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 3736 bytes
SHA-256: 1ace5ac51bd3178733f1722b518931ebd9aefe3506a1409708f4adaa7cf05f39
font_01_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 5036 bytes
SHA-256: c2f1a2d7c14cee72192f53567c010dd4e368cf5e90f938d70907457198d79b0c
font_02_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 11644 bytes
SHA-256: 47a1d5a6b6ea7aad2b44be54493cbb7662122163f5ab05338f9f9ba953d507d1
font_03_sfnt_off00013de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c