Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1fc23c11887239…

MALICIOUS

PDF

105.2 KB Created: 2021-06-03 00:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4ee3b04023ec727117484f9552ce8720 SHA-1: 2bc0c64efbc13874e98f7dac74dbe4a021c4e25a SHA-256: fd1fc23c11887239ab9dbf82badbe1f41fba2fa9ae3c3eaf8f431047c901f831
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external PDF files hosted on various domains, including disposable ones. The primary URL suggests a phishing or scam attempt related to VPN usage for streaming services. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to drive traffic to malicious sites or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://drafthe.ru/pbw?utm_term=is+it+ok+to+use+popcorn+time+without+vpn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460966/normal_5fdaaba89f747.pdfIn PDF document text
    • https://giledaxije.weebly.com/uploads/1/3/4/3/134312043/3017603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_60330ca079ff5.pdfIn PDF document text
    • https://gelejidog.weebly.com/uploads/1/3/4/6/134688201/pizemiziw_pifilopemuda.pdfIn PDF document text
    • https://xefakebeka.weebly.com/uploads/1/3/5/9/135993821/taxifili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6023674ec4c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446015/normal_6038149bd4b25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470977/normal_60119e9182237.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_6007fccc5ca00.pdfIn PDF document text
    • https://jesaguxofugu.weebly.com/uploads/1/3/4/6/134659129/ee31d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461229/normal_6015903868d88.pdfIn PDF document text
    • https://koxamuru.weebly.com/uploads/1/3/4/8/134890845/2754489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457843/normal_602a3f79d91a1.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/1862275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_606a42d1c50e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_6026ff1557811.pdfIn PDF document text
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/df34eaf9fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_6002828ddeede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144411312/difojomuj.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/w/file/fetch/144465384/1430880315.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/f/dihybrid_cross_rabbit_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124B3 6740 bytes
SHA-256: a0d9dcceeb690448bec6e4733e4a663362c9fccec9c65715efda1e215d2abbf4
font_01_sfnt_off0001358f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1358F 5084 bytes
SHA-256: 4b72b52fc246ecd08a3f64e8f1e2edd64c3659b9b3c8a4e6ad52f6d3abf7c5d5
font_02_sfnt_off000146c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C7 4012 bytes
SHA-256: ba8e72d887f3ae5fe0265739a84a1da04f4566f3a8bd20bacebdf7d4edf4748b
font_03_sfnt_off000156ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156CE 11412 bytes
SHA-256: 43a3a0b85abe43df1162dfc6a8f396d90e4d26ed47fc745af4f06c0babbaac5f
font_04_sfnt_off00017ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DDF 16364 bytes
SHA-256: e4999c077db9394ef4ce8e36e5f5004bfda2ca3da09fd73fd46a231945d62f38

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