Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffea40bf91b27422…

MALICIOUS

PDF

53.0 KB Created: 2020-10-20 11:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 67ef76e7391b8bfcb541bea824a44de2 SHA-1: 772897e08ab94765434f37a78ba84b6bb6de088e SHA-256: ffea40bf91b27422aa43bc628bcc2a7d8fd7d9342a8d3c2d680fac7cf73170a1
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting services and some redirect to malicious infrastructure. The primary redirector URL is associated with known malicious activity, suggesting an attempt to distribute malware or unwanted software. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to harmful content.

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/pify?keyword=kinemaster+prime+2020+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5f8b13a2cece2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_5f8aed45cd413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5f8cca0ff1b01.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/japexovizabid-bomosewefum-kujimisix-givirako.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/kusutonewu.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/9b84c1.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/03ee1cfb5a3.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/mupabibu.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/kozewapo-lobaravizonit-zedumesixeduwuf.pdfIn PDF document text
    • https://desaviguwogo.weebly.com/uploads/1/3/1/8/131871994/d7f9cb49.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/7872040.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/zonekagififeb_denules.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f8bad972ee64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8ba00144db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8ad2314d094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f897f4e8f4c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 5504 bytes
SHA-256: adee360e187cd2face966784b8e4a873b661159dd94622099bcde932a377b438
font_01_sfnt_off00008e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E39 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00009994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9994 2116 bytes
SHA-256: 991f7ef292b59849fa1804c361c52a6255426db797fbcab3b5d31d1f34ee76c9
font_03_sfnt_off0000a33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33F 10060 bytes
SHA-256: 219e5057b4ac0df50cfd0e558297da64205091570ea6cb340ecbbf9444260596