Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f14d50853f8e886…

MALICIOUS

PDF

73.7 KB Created: 2021-01-16 22:25:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c6b49b1842868a88be7dcd60c5ef23af SHA-1: c16d98f4d48781e4d08914bc7cc808a4e8c70d2f SHA-256: 2f14d50853f8e8868f144dc13c00cdb0ba8ad3650cda9145496827be642df774
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation scheme. One of the extracted URLs, 'https://trafffe.ru/123?utm_term=eufora+sculpture+ingredients', is particularly suspicious and likely serves as a lure or a redirector to malicious content. The presence of embedded JavaScript, though not explicitly detailed in the provided evidence, is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=eufora+sculpture+ingredients PDF link annotation
    • https://dafelubuvotaxid.weebly.com/uploads/1/3/4/7/134753950/vuleri.pdfIn PDF document text
    • https://gozataxuwo.weebly.com/uploads/1/3/0/7/130740141/7e553af00e0153.pdfIn PDF document text
    • https://vulodimov.weebly.com/uploads/1/3/4/8/134880101/vakewegagufumoz-jidawafezeberow.pdfIn PDF document text
    • https://site-1191940.mozfiles.com/files/1191940/33242054495.pdfIn PDF document text
    • https://site-1167954.mozfiles.com/files/1167954/kung_fu_fighting_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5fcd78d17a908.pdfIn PDF document text
    • https://site-1176622.mozfiles.com/files/1176622/tubumowefesujijor.pdfIn PDF document text
    • https://site-1175017.mozfiles.com/files/1175017/31587005737.pdfIn PDF document text
    • https://rajerese.weebly.com/uploads/1/3/4/3/134387708/xabetupuvikoxenibewo.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/susaviv.pdfIn PDF document text
    • https://site-1181732.mozfiles.com/files/1181732/katemapinufit.pdfIn PDF document text
    • https://site-1168447.mozfiles.com/files/1168447/powerpoint_template_size_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fa40088217ce.pdfIn PDF document text
    • https://site-1166752.mozfiles.com/files/1166752/23_1_specialized_tissues_in_plants.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/pibajuwi/pure_imagination_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/jeep_gladiator_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/pe_guidelines_pain.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/wow_armory_name_search.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 5280 bytes
SHA-256: 42b3056047a036d0b760544f24a0f81dd86b16ea1e09a795c621eeb8b2aba379
font_01_sfnt_off0000f19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19B 11348 bytes
SHA-256: af5d85ad1c966d4a2b032aa3cb5c5d4642e2b2c0c49ede7f43835af733476fd8

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