Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc76ca85a2ab655…

MALICIOUS

PDF

99.4 KB Created: 2021-05-23 03:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f6fb2b09604b48ced32c8c00f0e015a5 SHA-1: 17011bd9896c76820776dda052221049d986dd4a SHA-256: 1cc76ca85a2ab65543eb32050731a17f9585f0c8b0aff58b25bff75cc7c0d0a4
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links, many pointing to disposable hosting services, suggesting an attempt to manipulate search engine results or distribute further malicious content. The primary URL, 'https://seumenha.ru/strik?utm_term=android+mobile+secret+code+in+hindi', appears to be a lure for users searching for specific mobile information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=android+mobile+secret+code+in+hindi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461483/normal_606ac39f32b89.pdfIn PDF document text
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/a45050b6.pdfIn PDF document text
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/delorowepomim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_601bf2fcb902e.pdfIn PDF document text
    • https://marelepo.weebly.com/uploads/1/3/0/7/130738501/banupoxum.pdfIn PDF document text
    • https://rawowoxok.weebly.com/uploads/1/3/4/3/134309987/f36bc6267f1bf5.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/xifekonomibenijuxuji.pdfIn PDF document text
    • https://balabirow.weebly.com/uploads/1/3/4/6/134690292/pigekisodoj_bazigizugomi_batokito.pdfIn PDF document text
    • https://gekipedagap.weebly.com/uploads/1/3/4/7/134750311/697ceb2b.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/1996636.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/zutukekisevij.pdfIn PDF document text
    • https://zebazefapik.weebly.com/uploads/1/3/1/3/131383848/5029214.pdfIn PDF document text
    • https://bolojowugupi.weebly.com/uploads/1/3/4/8/134886087/91f677f4b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5fcb591c8278d.pdfIn PDF document text
    • https://xasuzetevoke.weebly.com/uploads/1/3/2/6/132681443/fadigaw-segodipex-kegez.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/726348.pdfIn PDF document text
    • https://netokuwusava.weebly.com/uploads/1/3/4/3/134384506/sajaxanepenumosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418981/normal_601b383e03d78.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/6231598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_6015bbccb394e.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
    • http://fedorahosted.org/lohitIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B2 4888 bytes
SHA-256: 63c772426f3f0fb5d51599c2f9f4acc422f30935d661e56eae5d1da46c90c7c6
font_01_sfnt_off00011710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11710 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 10492 bytes
SHA-256: 9ca5cfbf9634a59bea7a93daec7899947f9694efbd5c4dff41f54f7c29085e94
font_03_sfnt_off00014682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14682 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
font_04_sfnt_off00015483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15483 13364 bytes
SHA-256: 8938d36a608cd0471e6de50c0b72a1f54a607791b37bd28601f1873a05423db7

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