Malicious PDF — malware analysis report

Static analysis result for SHA-256 1315c7c3e8f25f31…

MALICIOUS

PDF

55.2 KB Created: 2020-10-14 23:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 73f0fcc0b91d4febb65690a575f6a730 SHA-1: a76d147af07c76bcb710ac31be12f1978fdcd0ff SHA-256: 1315c7c3e8f25f31318eb3d1cc123aa131ef0d5382af5c0c8e3523c9ca49aff6
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=cocos2d+js+android+studio In PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/mapilupujiselabojet.pdfIn PDF document text
    • https://site-1042010.mozfiles.com/files/1042010/vikukigun.pdfIn PDF document text
    • https://site-1044161.mozfiles.com/files/1044161/rpg_android_offline_list.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/xananovetivagizaxa.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/91e26.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/tikewutoxawip-xeperebe-linejav.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f8756665d6f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8740ee7bc47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f871fc1bb930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f87436e8593d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f873d654d833.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/cb8148.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/2a5b38eef3430.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/tixobenudofezibet.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/vipezariwe_regumegotez.pdfIn PDF document text
    • https://site-1043124.mozfiles.com/files/1043124/69027252478.pdfIn PDF document text
    • https://site-1039725.mozfiles.com/files/1039725/senafufiwixuzobasase.pdfIn PDF document text
    • https://site-1042549.mozfiles.com/files/1042549/vixarapotumorutelekinofe.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/tirurekerawude.pdfIn PDF document text
    • https://site-1039754.mozfiles.com/files/1039754/63904751860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8740961bea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f870eeaf27ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f870dc18cde1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f871292d5f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f874d79e6138.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://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_off0000798f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798F 5016 bytes
SHA-256: c8f9b3a0ce35b5311c585e3480ee2a2a053841e7b0d38ff72c994a1412cb2f79
font_01_sfnt_off00008aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA6 14212 bytes
SHA-256: fd78e84ca00da509699310ca1359a449735b9f185cb916eaed9e461c8dd5a20d
font_02_sfnt_off0000b863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB863 16460 bytes
SHA-256: 4ff8de031e26ee870ed4622d57df4318a760d272b7a3006b3935db219ef5d477