Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc952f740a39004…

MALICIOUS

PDF

68.9 KB Created: 2021-01-20 00:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ae3749d013549df899ae96bca3df9355 SHA-1: b6442b5094b1c836501ad91a892577423bc51c48 SHA-256: 5fc952f740a390045cba057b833bc77dc3957c253abdda75446216696fad3af6
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document's structure suggests it functions as a link farm, likely intended to direct users to phishing sites or download further malware. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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 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.
  • 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://gettraff.ru/123?utm_term=dependent+samples+t+test+calculator In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403685/normal_5ffcb86ed43c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420454/normal_5fbf869210e5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419654/normal_5f987a66c4605.pdfIn PDF document text
    • http://zinekob.66ghz.com/cadillacs_and_dinosaur_mustafa_game_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5ff2f5914a7aa.pdfIn PDF document text
    • https://site-1226144.mozfiles.com/files/1226144/feresirojabewi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_5fb320fa5f851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_5f95fcfa9ecba.pdfIn PDF document text
    • http://nufarelarapo.iblogger.org/lodijaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366331/normal_5ff51edac9d79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5f97a1254efc8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407986/normal_5fefd0dd675b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5fa3c24de0737.pdfIn PDF document text
    • https://site-1173607.mozfiles.com/files/1173607/81847273166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454420/normal_600758f7f3d59.pdfIn PDF document text
    • https://site-1179462.mozfiles.com/files/1179462/kuselitiba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5fbd21d56d7cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vivimaga.epizy.com/72551282281.pdfIn PDF document text
    • http://fizuxobitunoge.epizy.com/84238748970.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_off0000d323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD323 5220 bytes
SHA-256: 5063170099be0eab76dc76a1bbdb19d2301f4de016f444045704d4bd3ebddf15
font_01_sfnt_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 9940 bytes
SHA-256: c118934d2e39730880222a5b7c9fb88ddd51405c783bdcee3fd62d1c2b18a75e

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