Malicious PDF — malware analysis report

Static analysis result for SHA-256 34eea62c426cf725…

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 08:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f4a848d8934df5b4df19fa1e03983a79 SHA-1: 329920da9619b60dbcd069c209c8e332e003f301 SHA-256: 34eea62c426cf725bd9823dd6216e6330744860d7a0cb031dfdc386e8cd4993d
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be related to search terms for downloading a book, which is a common lure for phishing or malware distribution.

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/award?keyword=billion+dollar+whale+book+pdf+free+download PDF link annotation
    • http://remont-kvartir-otzyvy.moscow/inheritance_patterns_worksheet_1_answer_key8vn52.pdfIn PDF document text
    • http://idealicaitalia-ufficiale.site/best_app_for_transcendental_meditationufup9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ff541c61dbbd.pdfIn PDF document text
    • https://somejokal.weebly.com/uploads/1/3/4/4/134494219/e9b4f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_5fd9697f0f9f7.pdfIn PDF document text
    • http://merovew.xyz/67857990725np7t8.pdfIn PDF document text
    • http://kemedejovon.getenjoyment.net/bachelor_of_architecture_thesis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_5fd9117ed91ab.pdfIn PDF document text
    • http://ehaberdevlet.com/genie_model_gict390_battery_changeay0h9.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/wavaxivu-zoziraj-nejimurezaj-vamupejexeru.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/gologebafexozebajus.pdfIn PDF document text
    • https://zefokivovemajo.weebly.com/uploads/1/3/0/8/130874141/83f0248f5fe.pdfIn PDF document text
    • http://about-central.com/99509763908s4p0g.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://eb9d0a7c-f241-4274-9260-18def620c3fd.filesusr.com/ugd/796b85_59c78978d8ec40d7a04f4691e039152d.pdf?index=trueIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_b5295ab02a7e4729bb59d1bd96538af3.pdf?index=trueIn PDF document text
    • http://nejimafalun.onlinewebshop.net/9717714459.pdfIn PDF document text
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_7d5e2e0dfdd94b6191e6b071e92830af.pdf?index=trueIn PDF document text
    • https://d2faa26e-66ca-44cd-8f84-883624a71019.filesusr.com/ugd/dbbfd0_72635cf4fce14628b16fc43dbada172f.pdf?index=trueIn PDF document text
    • https://0306adf0-382e-42f1-903d-71c3961c97f1.filesusr.com/ugd/7ff653_afec86b39c5b47299a36850730b7cc30.pdf?index=trueIn PDF document text
    • https://9c789f27-b70c-4c9d-9e83-211ee8f99b38.filesusr.com/ugd/bdeb4c_aeb73ce4dec2418aa0b8b768da52a1c4.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3F 4568 bytes
SHA-256: 1e8b8e8ac8b7b344116d891527c890c2c85e117e1d474f75adc8f557c6558897
font_01_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 5296 bytes
SHA-256: 1aff2195d37980ec0817d344ab4f54fbdb135988f9b433dc46ef3c7d909363d0
font_02_sfnt_off0000fe41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE41 11052 bytes
SHA-256: a029c4ba7dabbdda6b2bb062213b6daa3978301224f415ec31c203bd31952859