Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3287bda9c92842…

MALICIOUS

PDF

104.7 KB Created: 2020-12-15 19:02:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a2681290ad498f931524ade37c254e5f SHA-1: ce9b449dd1cb3f2b606ab2c0cf4ee73e04ae2a89 SHA-256: 4e3287bda9c92842e0196c2d7fa8ddf4b71240d089073837f242b4a879b27349
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, with one pointing to 'funugunuxu.weebly.com'. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://trafffi.ru/123?utm_term=theotown+road+guide PDF link annotation
    • https://funugunuxu.weebly.com/uploads/1/3/4/3/134384448/sabigukon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_5fcf369c7a5d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_5fc96cc816c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f90e46b6ef81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447662/normal_5fc931207965f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f947e2bee70c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372696/normal_5fa1868606ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fa5050362a6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5fa287815e9ff.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/9400205.pdfIn PDF document text
    • https://buximinolid.weebly.com/uploads/1/3/1/3/131381316/mezonerike_bovefus_nigamopirof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc4f390c6229360ecc6cc65/t/5fcd4a7feb18547f4b93026f/1607289471943/ninababexerokaxuvijiko.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14460 6416 bytes
SHA-256: 2a69545f8a9d104697b847a0f548493cbc920d2d91a2c508c9ca03512f8941e1
font_01_sfnt_off0001542a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542A 4800 bytes
SHA-256: 02f23f814247f17580a7b86def0f6a1abc70eceebd9801656ccacee584b1708c
font_02_sfnt_off00016474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16474 10340 bytes
SHA-256: 82f3a495634d2f18019d1c0ff77c035af0033c043354f1d10b0b378c7ae56061
font_03_sfnt_off000187de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187DE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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