Malicious PDF — malware analysis report

Static analysis result for SHA-256 2596d30c4cad62bb…

MALICIOUS

PDF

79.1 KB Created: 2021-03-03 17:16:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 500e60174ef238d2e398161ee9e2dd64 SHA-1: 37b0b14181c600fc62eafb3c111427bb574ea5ec SHA-256: 2596d30c4cad62bba267cbc03348efe1f81c4f73a8db6724f522861519c7af30
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which point to external PDF files, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=how+to+calibrate+a+white+rodgers+thermostat In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_5fd12d8b5079d.pdfIn PDF document text
    • https://lofofofudu.weebly.com/uploads/1/3/4/6/134621951/lawururik_wizarejalug_debazupa_guwusixufabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451971/normal_600b046e1967d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387586/normal_5feb3a9d5adbe.pdfIn PDF document text
    • https://ditiboxoteripu.weebly.com/uploads/1/3/4/7/134763901/rafirifegi.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/db5df8ce1c6d168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460946/normal_5fcd9d6707262.pdfIn PDF document text
    • https://zapamapat.weebly.com/uploads/1/3/0/7/130775391/4943853.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fe1354e5617d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412909/normal_5ff2c790144a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_60356270daec7.pdfIn PDF document text
    • https://monowulesamewul.weebly.com/uploads/1/3/2/6/132682048/xolad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_601307b964d85.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/will_no_game_no_life_ever_get_a_season_2.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/satudifin/bedopevematotikaxenef.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/allen_offline_test_series_admit_card.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/tumefaf.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/99303034332.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/real_football_2014_game_uptodown.pdfIn PDF document text
    • http://bitines.myartsonline.com/40308573633.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

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_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 5544 bytes
SHA-256: 81f6ba2f34bd8a044be4883d28a33ce8683f42e94b06a36b02c076d9c0b793cd
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 11056 bytes
SHA-256: 48fa424ba60df99971d227d3b3509b690ba9cbdc89124a42cee9415c830a0ec4

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