Malicious PDF — malware analysis report

Static analysis result for SHA-256 219457281729ecc8…

MALICIOUS

PDF

80.8 KB Created: 2021-05-29 07:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bee6331e9d9063939e6340a8d7082b74 SHA-1: db1b245c9108ada1415614e0e7fc144856616f0a SHA-256: 219457281729ecc8eaf68bb2fd5dac7e8ad22cb46208a639eecb92ccb22ed449
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=nios+secondary+mark+sheet+image PDF link annotation
    • https://vugijivanapuxa.weebly.com/uploads/1/3/4/7/134742443/2bf1b35a0b02c.pdfIn PDF document text
    • https://gibejuta.weebly.com/uploads/1/3/0/7/130776113/nunexesaru-papuv.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/2303153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_600b622e932ae.pdfIn PDF document text
    • https://xinegipifi.weebly.com/uploads/1/3/4/4/134404318/tegaxulovitigizagovo.pdfIn PDF document text
    • https://gufunemoxopu.weebly.com/uploads/1/3/7/5/137507416/wozenado-gokip.pdfIn PDF document text
    • https://renuzazofijixi.weebly.com/uploads/1/3/4/8/134865573/wupoweverodam.pdfIn PDF document text
    • https://geguxawuxereko.weebly.com/uploads/1/3/1/3/131379712/mitoliturebuzisajola.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/6699469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464735/normal_604772514fccb.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/roturaluxasi-wepidekubexu.pdfIn PDF document text
    • https://tamalokumolegi.weebly.com/uploads/1/3/4/6/134656593/b9c608783.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/wagaxe.pdfIn PDF document text
    • https://masenajeronuzes.weebly.com/uploads/1/3/1/6/131637464/xalevati.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/xewokezesok.pdfIn PDF document text
    • https://vogexuluvudo.weebly.com/uploads/1/3/2/6/132695782/bovedasowegovix_vejupisipepomi_zekobemuvemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a7eaa68-0834-4b3b-a0ed-f831d6ab1f5a/marley_and_me_watch_online_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba918ef-4e3e-4a38-a7f0-dba54b1923d3/42562965678.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/041dcb89-4fbf-45f1-b25a-a61c5a3241fa/how_to_heal_chigger_bites_naturally.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d6be1c-c4b1-4620-b53b-1ddda490939b/rejiji.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_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 5456 bytes
SHA-256: 1e097d8ba3d838990c624286f7a8664bc6cb7864da4159310d510c9845498f0c
font_01_sfnt_off00010f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F16 11528 bytes
SHA-256: 0ec1d7bb5690988de465dac2cc7547fbb1a8cff54b35fb22c0f4813ccd24bdb3

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