Malicious PDF — malware analysis report

Static analysis result for SHA-256 835eee9700d7315e…

MALICIOUS

PDF

73.0 KB Created: 2021-02-21 16:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6b9c76aa02698599643dbf9c8e801126 SHA-1: ffa9c35fe1e12860ef0bc4988bf7f0dbea032590 SHA-256: 835eee9700d7315eb3b27c5d145ec0710e2c8213bc05069fdead343a0c106911
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=craigslist+in+syracuse+apartments In PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/0a795c535f.pdfIn PDF document text
    • http://mp4.design/351281595248f3dn.pdfIn PDF document text
    • https://fiwerabonu.weebly.com/uploads/1/3/4/3/134347662/ranumomidadubizu.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/zizolivetelixeko.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/murililitezupof_tekejakuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485591/normal_6000a4a84f8d0.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/hhjnoFf/22052917493.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/dehbDig/cold_abscess_pathophysiology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474445/normal_6008ebad48974.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/totawobazenifowobibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601d3917f1f65.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/8255013.pdfIn PDF document text
    • https://rixijufufapug.weebly.com/uploads/1/3/4/4/134497528/sajirivo.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/byYsMib/dimefowi.pdfIn PDF document text
    • https://cdn.sqhk.co/simunenij/eijj7rg/50223045421.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501654/normal_5fcdc0bc1aeaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412909/normal_5fe64bcd5b1a4.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/mokuwanibof/reiner_and_bertholdt_transformation_music_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/numafel.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/zagisafijewavubimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/9119109675.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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5260 bytes
SHA-256: 41474fdb0c9350a91084a5b9b51188025ce693c5098587967071b33f413fa6fa
font_01_sfnt_off0000f28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28C 10460 bytes
SHA-256: 1cd0f908db584d543f4025a0eeda476684e918cf3e0ecbc35b856d298bafd4dc