Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d2eb06adc3b83d6…

MALICIOUS

PDF

66.6 KB Created: 2021-01-21 15:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3fdc219aba71ba0443494f4b7c2e20e7 SHA-1: c88c0e9ef5e642ceea7701937c785854536ae682 SHA-256: 1d2eb06adc3b83d6c065343b94d33b53fafb9d64968f20799bb0e578d3336f8e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which are hosted on disposable domains and point to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=atomic+habits+pdf+vk In PDF document text
    • https://site-1176272.mozfiles.com/files/1176272/open_university_of_hong_kong_admission_score.pdfIn PDF document text
    • https://site-1180978.mozfiles.com/files/1180978/bufupog.pdfIn PDF document text
    • https://cdn.sqhk.co/gitesafuwu/owgjvfj/88900564024.pdfIn PDF document text
    • https://site-1175290.mozfiles.com/files/1175290/mitibezowev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414494/normal_5fd308c3520d1.pdfIn PDF document text
    • https://site-1244760.mozfiles.com/files/1244760/coffee_day_global_limited_annual_report_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405903/normal_5fee813aac93d.pdfIn PDF document text
    • https://site-1173985.mozfiles.com/files/1173985/lafekukawutawawuvupeket.pdfIn PDF document text
    • https://site-1179818.mozfiles.com/files/1179818/90691306958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5fc3af09aa309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486565/normal_5ff4fdf20604c.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/jRigjaA/kelej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367289/normal_5fe4c72742f1b.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iifXBCJ/lupanoliwuxozaxofuwawit.pdfIn PDF document text
    • https://site-1247010.mozfiles.com/files/1247010/hemangioma_hepatico_2015.pdfIn PDF document text
    • https://site-1194646.mozfiles.com/files/1194646/acoustica_mixer_free_cnet.pdfIn PDF document text
    • https://site-1175524.mozfiles.com/files/1175524/events_and_adventures_dallas_tx.pdfIn PDF document text
    • https://site-1175261.mozfiles.com/files/1175261/annamacharya_keerthanalu_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/mjhjhhj/34155658218.pdfIn PDF document text
    • https://site-1202007.mozfiles.com/files/1202007/kepuximosejiti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372967/normal_5fcc5bdc6b120.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 5520 bytes
SHA-256: 5ac93650c410ed1ac9733dabefb10ae52fdea8523078e8e7b44f3f212c165450
font_01_sfnt_off0000d985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD985 10440 bytes
SHA-256: 438b8df0cb734a4d44beaec5516b5572f720b3f0d7429d182beb933b61256d51

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