Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c6c91699a9de7b…

MALICIOUS

PDF

80.7 KB Created: 2021-03-15 09:45:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a4a4238fdc615cf871cbb2acbca009cd SHA-1: 534b451881da36b2062a9a18ecc471c51e380bf5 SHA-256: 46c6c91699a9de7ba4bdf539324c72d479b687f89b920e453c199594939f22bc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

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://golowaki.ru/wix?keyword=what+was+made+in+a+kiln+in+ancient+china PDF link annotation
    • http://golosa-spasibo.ru/stihl_ms180_chainsaw_price_ukev1tn.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/saluda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_604ec3cbec59f.pdfIn PDF document text
    • http://shoop-fm.ru/37061132749959qr.pdfIn PDF document text
    • http://habercigo.com/ego_select_cut_lawn_mower_manualhgni2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fdb5cb4622d8.pdfIn PDF document text
    • http://blancop.xyz/826788272984xxpq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413012/normal_6008ed6cb7efd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_60473af37afbe.pdfIn PDF document text
    • http://porizaritofo.mypressonline.com/nofexaxudidoremor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5fe8c7736b248.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/linkers_and_loaders_download.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/dojabebizifigebamezala.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/0e6118e7-b48d-47b9-b33d-f5c726127eb8/tomorrow_when_the_war_began_tv_series_season_2_release_date.pdfIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_b42a11541a8144cab7a9a8d99fd5da61.pdf?index=trueIn PDF document text
    • https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_dd107a36604b4b63accee0f16cbe1155.pdf?index=trueIn PDF document text
    • http://pogifovemujure.epizy.com/gegugajisajonurufokevude.pdfIn PDF document text
    • http://jezutax.rf.gd/19586144253.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_b103fbe0bba2438f86a70687669e6795.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fc049e-48f7-47fc-bb37-27bc4a42b84e/gluten_free_dairy_free_dessert_recipes.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_4eb788a3af8d439b843c93e67313c2d6.pdf?index=trueIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/anti_terrorism_act_2020_pakistan.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_off0000f1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 3448 bytes
SHA-256: 911cd2026a10bdb8ff9e05be06cc1f3381b0a2297bd9828c11303e3b7cc4b947
font_01_sfnt_off0000fe3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3A 5252 bytes
SHA-256: 25b8f0396e75efe90cc6a8b5b96615fe584440a09569d30ed27d6fe715641cca
font_02_sfnt_off0001100b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100B 10988 bytes
SHA-256: eb20d773af36b215fa7f1a78953d709630eef154eb21a928b9bae6397a1cd71f