Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f1aee8bf4f70bf…

MALICIOUS

PDF

85.4 KB Created: 2021-03-12 14:37:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 3282b41d8581bbc5f281dca97246e72c SHA-1: 023ad9a0fb11a5ccbb3e2697ae14be5ec8079ac0 SHA-256: 34f1aee8bf4f70bf7105a98d38030df542670bbe2827dcb653bb91d5fe0bc1cb
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically flags the document's structure as a link farm on disposable hosting, reinforcing the malicious purpose.

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
  • 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://druttle.ru/wix?keyword=united+767-300+polaris PDF link annotation
    • https://sibafuguwo.weebly.com/uploads/1/3/4/6/134679660/5783146.pdfIn PDF document text
    • http://rodsfish.club/50983643177qeoij.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/periodic_table_with_atomic_mass_download6cahm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5fe3bee1c1c39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_60475f1586373.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/42324440656.pdfIn PDF document text
    • http://astropsychology.site/spirit_halloween_animatronics_pennywiseifpfa.pdfIn PDF document text
    • http://zelopaqq.xyz/winchester_western_24_gun_safe_priceuparl.pdfIn PDF document text
    • http://tophomework.space/another_eden_tome_guidet0a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457560/normal_603048c509bd8.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/f1da7c3dede.pdfIn PDF document text
    • http://atomyimperial.ru/teachers_college_press_return_policyxkn3s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bopisumeku.atwebpages.com/10947231668.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/why_is_my_whirlpool_washer_not_draining_water.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/48478692761.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/what_is_the_definition_of_enthalpy_change_of_atomization.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD4 5516 bytes
SHA-256: 546bbf5ccc8ba187e89f09e0a6b36189b15e43371cd4a25d7ce615bcf9a0abf4
font_01_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 10420 bytes
SHA-256: 43cd927f2c7b4bdf609328f26c55b2aebb0d6fc655ee90db9d2026c37502e49d
font_02_sfnt_off00013290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13290 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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