Malicious PDF — malware analysis report

Static analysis result for SHA-256 158f2e3161066865…

MALICIOUS

PDF

69.4 KB Created: 2021-06-13 15:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1893594c2c65778ef4546317f2f8f5bc SHA-1: e8a0501aff1f7d456a5e1bf6e30b7e2a85c6c03c SHA-256: 158f2e3161066865d625cd14ee7e4c185eedb175b8b7c031785592e8b04d9252
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8328

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://catamma.ru/pbw?utm_term=bangla+bhakti+song+mp3 PDF link annotation
    • https://xikagarema.weebly.com/uploads/1/3/4/4/134489929/ditasedamirifa.pdfIn PDF document text
    • https://xopubisewono.weebly.com/uploads/1/3/4/5/134507782/6fb979f24460e.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/dejalenujiwipi_vuropo_rejekurowe.pdfIn PDF document text
    • https://ludubilataso.weebly.com/uploads/1/3/4/7/134719947/rutiradujunop_jujal_gamirazabamitos.pdfIn PDF document text
    • https://xipakopubax.weebly.com/uploads/1/3/5/9/135966228/7f4cea88f740.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/napejatexodiga.pdfIn PDF document text
    • https://tedatigajixa.weebly.com/uploads/1/3/0/7/130739480/talopobikenar.pdfIn PDF document text
    • https://palokeligiz.weebly.com/uploads/1/3/4/4/134496709/fogoxeralimozusuw.pdfIn PDF document text
    • https://xelekukoxenafo.weebly.com/uploads/1/3/7/5/137513843/b7eb637268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/653a1f75-a180-41a9-bbc9-66a945331d0b/92216559729.pdfIn PDF document text
    • http://winubuton.pbworks.com/w/file/fetch/144947820/nuwisuxevonagufuwulazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abb665f-191d-4643-9573-d8c4964d2d84/35360961933.pdfIn PDF document text
    • http://tewabavuxate.pbworks.com/f/co-z_automatic_sliding_gate_opener_reviews.pdfIn PDF document text
    • http://wigonewakil.pbworks.com/f/xijime.pdfIn PDF document text
    • http://lilofebuful.pbworks.com/f/phillips_exeter_academy_mathematics_2_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc55fc04-ad46-493d-a774-7e1aa38f2b62/where_can_i_get_prescription_safety_glasses_near_me.pdfIn PDF document text
    • http://finatin.pbworks.com/w/file/fetch/145107852/free_feelings_worksheets_for_kindergarten.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/clash_of_clans_free_hero_skin.pdfIn 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_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 5224 bytes
SHA-256: 64cdf6b33aacb2f3b2cf2281705bfbbaaa3450c05ceaa07c7ce80f587f43302d
font_01_sfnt_off0000f37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37E 11200 bytes
SHA-256: 4f96631b61342c7d77f6b556269063c5397d9a514affb9d2153e1eac953145b7

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