Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bf61db0eb75746…

MALICIOUS

PDF

77.6 KB Created: 2021-04-02 22:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 71d71ee194b2989dfa86e80e752d1f42 SHA-1: c9035c16404232b3d59c05c9e259c58522330166 SHA-256: 26bf61db0eb7574602c5e0ada0c4a037f7414932639a9ba2cb37d641db42f40a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. The primary URL, https://maypoin.ru/123?utm_term=netflix+certified+android+tv+box, suggests a lure related to streaming services. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware via the linked PDFs.

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://maypoin.ru/123?utm_term=netflix+certified+android+tv+box PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423429/normal_604cedb986eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_6064d9587cc7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_60644788899fc.pdfIn PDF document text
    • https://xidokuwu.weebly.com/uploads/1/3/1/4/131453793/jabotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380707/normal_6056c4585aaf6.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/9029544.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/gevato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447252/normal_604f3976af0ae.pdfIn PDF document text
    • http://tuzojexis.mypressonline.com/blank_world_map_countries_quiz.pdfIn PDF document text
    • https://vatipasa.weebly.com/uploads/1/3/0/7/130775610/sowidavasipu.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/sizadagazagaj/80447985018.pdfIn PDF document text
    • https://11e0ccb5-01dd-4757-ae93-f6f3b4f5ca32.filesusr.com/ugd/1a2ce6_f9e4597e4f7c4b298dfcc1aa8430d8c6.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_bc7ff9613bc4466fa5dac8bcaf718f07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wujixus/bupipulafikimaniwefamu.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_992e2d8387db4f8f8fe14adf0b666aea.pdf?index=trueIn PDF document text
    • https://1347de4c-4e54-429a-b84c-372e60bc5a2b.filesusr.com/ugd/6c98bc_30281f75a0064b24a32871e18a8b1f44.pdf?index=trueIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_e0dbf6aa62eb468a9f94662941b6e663.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF296 5072 bytes
SHA-256: de4a817c1d9fecf9006e94fd3e69ed40d0d7676fef86dc54223868f22c294e6e
font_01_sfnt_off000103f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F4 10984 bytes
SHA-256: bbd476633b3e8b3f03bb14eece4cad74e0694386e57a491b014edd6922a8b630

Open this report in the interactive analyzer, or submit your own file for analysis.