Malicious PDF — malware analysis report

Static analysis result for SHA-256 02cea376330aee7b…

MALICIOUS

PDF

93.7 KB Created: 2021-02-22 10:52:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c54870540b00510e756ae51db9373615 SHA-1: b2122485c8dd9159727b0e3ab9f22f602f6ba783 SHA-256: 02cea376330aee7be6538a7a225a16c5fc75de3a581b44a3858e17a33f9d71f5
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with many pointing to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wb?keyword=good%20morning%20love%20poem%20for%20her%20long%20distance PDF link annotation
    • http://indital.fun/96647368579e3xc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478716/normal_6022d3e9db6a7.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/7528915.pdfIn PDF document text
    • https://povizizumor.weebly.com/uploads/1/3/4/6/134636509/2327bfb.pdfIn PDF document text
    • https://rokosogamutoluf.weebly.com/uploads/1/3/0/8/130873735/dbd9589a15fb5a5.pdfIn PDF document text
    • https://zavowajasobi.weebly.com/uploads/1/3/1/4/131406950/8475250.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fe9ef1990a46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_602a4646ac82f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_602d340c90145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493221/normal_5fd7d087599e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_5fc64ba382cf1.pdfIn PDF document text
    • http://wildboost.club/nawagibukabuxopukzn4y6.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/tobejawanol.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/77f7f0387bc95.pdfIn PDF document text
    • https://gawobomune.weebly.com/uploads/1/3/5/3/135317514/4277646.pdfIn PDF document text
    • http://optarfes.com/43970638912rl07o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450634/normal_600afc4831ece.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/napisakaluja/56838722732.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEB 5660 bytes
SHA-256: 7466c99832d291a0ea00441b7e501d3c7e99e69dee9f6ea3a4ba34684bc15d35
font_01_sfnt_off00013e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E03 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00014690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14690 10172 bytes
SHA-256: b4bd951f8a86e3d94255754db0a550bbbb32ae4f58e55f6a7f8c1805a0e11270

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