Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28bad52f37d16d0…

MALICIOUS

PDF

81.1 KB Created: 2021-03-10 08:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8175b57a66b3788fa1faf249c1e0b986 SHA-1: 9c78c8253e21b61c3fda71106c8b668c1dc25b4d SHA-256: d28bad52f37d16d06f35478ac1e7ebd8b1e450f7577187eb9cb08fdd2457ecd6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://yafferge.ru/aws?utm_term=super+pose+book+pdf+vk In PDF document text
    • https://xuvelusikifaza.weebly.com/uploads/1/3/1/4/131406656/zewezasate-tuminijejomip-melukefazi-wetiwininini.pdfIn PDF document text
    • http://reduslim-officialsite.site/wuxafuuf4so.pdfIn PDF document text
    • http://nazhivy.net/antichrist_superstar_from_dead_to_the_world_lyricszok3f.pdfIn PDF document text
    • https://zurukuwimuso.weebly.com/uploads/1/3/4/3/134325804/69d4b4e53b6584.pdfIn PDF document text
    • https://gewuvakir.weebly.com/uploads/1/3/4/6/134660990/vupewuziviwetu.pdfIn PDF document text
    • http://coloradocustomelectric.com/kovupisiravkvzgb.pdfIn PDF document text
    • https://zuxomizo.weebly.com/uploads/1/3/2/7/132710603/e94185c89d05d.pdfIn PDF document text
    • https://cdn.sqhk.co/gifexajed/AFzmBih/17295244030.pdfIn PDF document text
    • https://xiwikufebalub.weebly.com/uploads/1/3/1/4/131438050/d6d3176b5d7.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivunet/gjPLyjg/how_to_get_heroes_in_grow_empire_rome.pdfIn PDF document text
    • http://teachost.com/8131539338925z5g.pdfIn PDF document text
    • http://fit-italy.space/nuriguviruvetukolalumiguwy5o9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/lafuwamirogozoxuwinu.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/affine_transformation_matrix_inverse.pdfIn PDF document text
    • http://mepigaruvuj.rf.gd/character_and_antecedent_certificate_form_1.pdfIn PDF document text
    • http://fepesori.rf.gd/95542099884.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/4972441323.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/93906827468.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 5160 bytes
SHA-256: d3d21e3dab36eace130087204eb6af2aa5f3bb5c3e71b007d53e319027624b7f
font_01_sfnt_off00010209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 16216 bytes
SHA-256: bb26b87a1f1514e56eda8ce7ffbca5a8507a9e078e5b50770bc61024c85b295a