Malicious PDF — malware analysis report

Static analysis result for SHA-256 31712104cae34096…

MALICIOUS

PDF

66.0 KB Created: 2021-02-16 03:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b64f602267798b7ece5e5c38d22b2157 SHA-1: 0855f99449769a5865250c1e89f8e7e0360c4bc2 SHA-256: 31712104cae34096155f834e859764069f6a7c147e4c9362227043c3f239ec28
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=reactivity+of+alkaline+earth+metals+lab+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454281/normal_5fd6d26005c59.pdfIn PDF document text
    • http://vunijipejideg.22web.org/how_long_does_it_take_to_see_results_from_collagen_pills.pdfIn PDF document text
    • https://meribukefola.weebly.com/uploads/1/3/4/3/134314312/5638045.pdfIn PDF document text
    • https://toxovapuwelubu.weebly.com/uploads/1/3/4/7/134733969/075d0bbc52b50e.pdfIn PDF document text
    • https://pakitaxe.weebly.com/uploads/1/3/4/3/134318313/517cb937.pdfIn PDF document text
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/zegivomojabule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_600490b9d20ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383565/normal_5fe6d1f5b1599.pdfIn PDF document text
    • https://kabijibijeg.weebly.com/uploads/1/3/4/9/134900291/rofaderipa-kogib-sovazejesesun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490365/normal_5ffeadd340169.pdfIn PDF document text
    • https://lilususuki.weebly.com/uploads/1/3/4/3/134317990/68580f32d30f004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fivamoxopel.epizy.com/64368812846.pdfIn PDF document text
    • http://giserokusifuzi.epizy.com/rupugafibogejabu.pdfIn PDF document text
    • http://takefaluzimun.rf.gd/double_gate_fold_template_indesign.pdfIn PDF document text
    • http://kedokonox.rf.gd/british_journal_of_cancer_guidelines_for_authors.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_off0000c47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC47B 5584 bytes
SHA-256: 5427d0931c9a3372e1571470e0e3dc5489789798bd021d2659b1fa4db8360aa3
font_01_sfnt_off0000d774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD774 10288 bytes
SHA-256: fec9885d3be948371cc11c273b6fe2fda1d7b32c869d3accdc1b36498f4abbed