Malicious PDF — malware analysis report

Static analysis result for SHA-256 4522255d3aa02936…

MALICIOUS

PDF

46.1 KB Created: 2020-10-28 14:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6471c5ce929ff1d4faf0b6461a6f01d9 SHA-1: 595c7e729718d26f1e8cea7100c580b4bdd0251d SHA-256: 4522255d3aa029361b5b83108c9063e724457614db57903f81999b726decfe7b
184 Risk Score

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://ttraff.link/pify?keyword=chromium+apk+for+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5f99438190b64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f873f3072e06.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/fe19c4.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/f9ea3695.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/d4c10aa63a1.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/besiseku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369671/normal_5f947a83e7999.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/53a2f80484d7a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366305/normal_5f906931d06fe.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/lerapik.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/272811.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/xukinorotaxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f8e783c352aa.pdfIn PDF document text
    • https://gutilutaxare.weebly.com/uploads/1/3/4/3/134333879/pikowapis-jimolugiki.pdfIn PDF document text
    • https://xajoxivanuxus.weebly.com/uploads/1/3/4/4/134432241/636395.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/sagavifom_ratirapeman_pogifetaxu.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/ririsuxorotapemab.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000067c6.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000067c6.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00009cdb.bin)
    • https://s3.amazonaws.com/levovod/78390085169.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/who_framed_roger_rabbit_carnage_count.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/asme_bpvc_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/social_effects_of_colonialism_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/learned_optimism_free.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 extracted file (font_00_sfnt_off000067c6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C6 4712 bytes
SHA-256: 946a0ef4e0c0a7301e9af9f12c18ca2a1ec22e9276a8f38c7a10c88c61dd4b8f
font_01_sfnt_off000077c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C9 10904 bytes
SHA-256: 22d537fb69bf31e414f42fdb5f1f2097de08ee0c504fadf6caf9fe0db0b9c1ab
font_02_sfnt_off00009cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c