Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a95f473657a63f…

MALICIOUS

PDF

73.2 KB Created: 2021-02-11 02:21:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: e9466ad657b6eae3cabf5bf5ca9c90cd SHA-1: e05826f5f92170851ce6a9649dbb59562e2ac065 SHA-256: c8a95f473657a63f02f4587fce1571080f8814b029b0dedca8732a8b3f3bce25
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=cracked+pandora+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425235/normal_600b78167afc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457868/normal_5ff7fe9ba6a88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_600e9971eac4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484994/normal_5ffd99568f0d4.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/jotejex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe83bb4df81a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469116/normal_601286da308ee.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/1696693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458124/normal_600f6534968bb.pdfIn PDF document text
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/8137500.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/2718667.pdfIn PDF document text
    • http://servicesforsupport.com/zelokixadigotutopotot8tw3d.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/feseni/aprender_hablar_japones.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/sijoravawapagapezezilite.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/oracle_blockchain_platform_pricing.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_off0000e2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B8 4824 bytes
SHA-256: 7d3301ab40cddc1915cb96c1d3550070409edea8525b48fad8d53083983894c2
font_01_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 10852 bytes
SHA-256: 6954e7999848bf31a95d4c3438f0eb96e89284ebe9c55ea642d909074ebd271c

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