Malicious PDF — malware analysis report

Static analysis result for SHA-256 30415f09c9ffe363…

MALICIOUS

PDF

94.2 KB Created: 2021-02-20 22:52:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 82ba4502c7ff11583e9a193f46320230 SHA-1: 70167142b8acecfe4cb3e63d3b606933bb17bbc2 SHA-256: 30415f09c9ffe363a85f035a0c47b7b241982116bbe3269885b659f0ff143c82
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/strik?utm_term=attack+on+titan+live+action+cast+levi PDF link annotation
    • http://magnetfix.store/babituwosergfn91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_60222473df6f0.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/hc4jjia/skater_skirt_black_and_white.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/hgjjMjb/download_tyrannosaurus_rex_simulator_3d_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/gIgexgj/numova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_600b4e5828fbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373241/normal_5ffd7e4a53a53.pdfIn PDF document text
    • http://avtovishki-msk.ru/mesabuzirerijivmnxln.pdfIn PDF document text
    • https://lerekisisag.weebly.com/uploads/1/3/1/4/131408666/jidufex.pdfIn PDF document text
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/mutigaketapabow.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/jiceibD/52605374006.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/bulolimepol/toworevematasetejebukevo.pdfIn PDF document text
    • http://lepetape.epizy.com/17441033631.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/python_datetime._datetime_to_string_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/verbe_anglais_francais.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/89142230970.pdfIn PDF document text
    • http://fanedabomo.epizy.com/durable_power_of_attorney_form_florida_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 8196 bytes
SHA-256: 06ae1600b90b868e2001242ac16e66bba933931528fd914b7883e21a4e8226b8
font_01_sfnt_off000132f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F0 4812 bytes
SHA-256: e5c03f07e072dec86d17b09e5100f13ffb148f53de3aa89eaa5e62b6bfb34d85
font_02_sfnt_off0001436c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436C 12152 bytes
SHA-256: 9c07438d2e0e963e1ed1533abf4193af1227fc3f8ff305430091b9b91c9cf5bc

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