Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aca9452f911c8ea…

MALICIOUS

PDF

174.6 KB Created: 2021-01-19 20:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bece51c0086e1b27a06cbb660b40b4e6 SHA-1: 19b5528c363183f94d140f596fbe7184023eb154 SHA-256: 7aca9452f911c8ea9fe947f1bc85f3edd2f5f1c06bda0b6a01ca907657144b45
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or scamming attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection indicate a malicious intent to redirect users to harmful 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
  • 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://traffking.ru/123?utm_term=babe+ruth+daughter+net+worth+2018 In PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/c59413611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416301/normal_5fbdf76cc1709.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5f9ebac5a2048.pdfIn PDF document text
    • https://notilapixoto.weebly.com/uploads/1/3/4/3/134397855/5d432ae72.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/ixgchgz/finding_blue_free_apk.pdfIn PDF document text
    • http://dudipoviju.22web.org/buildbox_templates_free.pdfIn PDF document text
    • https://site-1207400.mozfiles.com/files/1207400/driver_license_test_study_guide.pdfIn PDF document text
    • https://wegizazuxiri.weebly.com/uploads/1/3/0/8/130814830/wewuruwotamiwoma.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/Ijjiihd/lucky_coin_shop_idle_heroes.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/liwekazovexu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495694/normal_5feba105462c0.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/ihbheia/11574829078.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/pjbsig6/pixel_swordfish_io_apk.pdfIn PDF document text
    • https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/vosuruba_puxamiginamoki_rinosuresiteke_vesadakidibiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vatapusaf.rf.gd/8386526354.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_off000271ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x271EE 5676 bytes
SHA-256: ecd36986928f9e6bd05e4fc7383df314a5708296e2dc394d25ebef0ed22218d2
font_01_sfnt_off0002854e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2854E 11612 bytes
SHA-256: c3c632a8d8a448df74626855e64dae4301804f297659a493d5d3545c0df65f09

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