Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70f4e8d53682b2d…

MALICIOUS

PDF

76.5 KB Created: 2021-02-25 07:40:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: deb6bd9d649dc7c96a43fbe53e7e2b28 SHA-1: a393084bb6deb97065a32a15622234f4a9348c8c SHA-256: b70f4e8d53682b2df6a2b0f03c2c9bd9106995ce1383edec717089de57c9d97c
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though heavily garbled, contains keywords related to movie downloads, aligning with a lure to entice users to click on malicious links.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/award?keyword=jack+reacher+2012+movie+download+in+hindi+filmyzilla PDF link annotation
    • http://steblin.pro/business_action_planner_notebookw6tpp.pdfIn PDF document text
    • http://gramnews.xyz/how_do_i_unlock_my_hotpoint_washing_machine_door3yt2z.pdfIn PDF document text
    • http://lovepositions.info/12301396443u9qif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404514/normal_5fcdb36e6917c.pdfIn PDF document text
    • http://centerverifybadge.com/21722254537htxf.pdfIn PDF document text
    • http://ruszaimclub.ru/how_to_start_at_the_gym_for_weight_losspfn2g.pdfIn PDF document text
    • http://nesobaka3.xyz/dora_the_explorer_and_friends_games7u9jp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450037/normal_5ffc1f610b3f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_600baa5703bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_5fd8890ccdfb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454162/normal_60370c5e97179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_6016e16d37a56.pdfIn PDF document text
    • http://classicalnaturally.com/43772507334c70qj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480893/normal_601a82ea19166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412588/normal_5fdbda646a1be.pdfIn PDF document text
    • http://idealica-italiaofficial.site/cdula_de_rfc_con_homoclave_formato_oficialityz6.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/mokuwanibof/molakusasapo.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/salicylic_acid_solubility_in_chloroform.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/86119469084.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 5768 bytes
SHA-256: a6409fb0555955145a01f7846c4cccaebe3bbf854b5e1a8c5e73b5339e606c6b
font_01_sfnt_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 5580 bytes
SHA-256: 8b6f8c52053b334b10887fb5a131231d6f49726c1739297e5826541aaf697694
font_02_sfnt_off0000ffe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE6 10492 bytes
SHA-256: c36270a770015109a28ebcdefa118803009d21ac687a6169b5c85e79ce416a69

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