Malicious PDF — malware analysis report

Static analysis result for SHA-256 630fa32d3d6f8f02…

MALICIOUS

PDF

90.4 KB Created: 2021-03-29 17:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 93814ce29f054ebea478b05f22d669e0 SHA-1: 121e9babbb95932fad7c2f7c88843196b56dccbd SHA-256: 630fa32d3d6f8f02934178bb3a4f4bb1176ed01f568f9c05b3dd9c43ff1fadbd
186 Risk Score

Malware Insights

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

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 0.9997

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 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
  • 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://fokemale.ru/123?utm_term=blank+new+food+pyramid+template PDF link annotation
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/vafujerukewil.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/f83d1359994.pdfIn PDF document text
    • http://olymp-trade.top/kevivekatakabugwxk54.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/6076566.pdfIn PDF document text
    • https://vavimogazoru.weebly.com/uploads/1/3/5/9/135968849/kemokonikevuta.pdfIn PDF document text
    • http://legalvictory.group/pop_music_clean_listdmohm.pdfIn PDF document text
    • https://nabodumikipili.weebly.com/uploads/1/3/2/7/132712011/likapopodus.pdfIn PDF document text
    • http://galabogenezoso.getenjoyment.net/thousand_miles_piano_sheet.pdfIn PDF document text
    • https://linonojito.weebly.com/uploads/1/3/1/3/131380720/87090afb.pdfIn PDF document text
    • https://vuginavoji.weebly.com/uploads/1/3/0/7/130775358/6056928.pdfIn PDF document text
    • http://masito.space/89132693414rkbqp.pdfIn PDF document text
    • https://gonibokufelari.weebly.com/uploads/1/3/5/3/135346176/3d8aabb896bcbd.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/rsmeans_building_construction_cost_data_2020.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/mogugidoda_famerirem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_8d03d6e569f149f18951052906dffa7a.pdf?index=trueIn PDF document text
    • https://2ed821ec-8078-4e74-b11b-c5cec6a88262.filesusr.com/ugd/65e777_dd8befd703684dff8c0e7b0014ab3ac2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/redexumozedamanazasado.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_4175bb84c22544ac8c27da56f3486e49.pdf?index=trueIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_3e2ab6ca53dc48ebb95506f2cf42e296.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/apprendre_alphabet_russe.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_4726843f8a1b4f218faa6defaa498cba.pdf?index=trueIn 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_off00011e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5D 5316 bytes
SHA-256: 7255fa1352476a3935218588b1a3fefbaed2ce94e1971b03e903959c650df213
font_01_sfnt_off00013084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13084 12588 bytes
SHA-256: 44a3d18c233f1622799d8c9d757a4b2778e43803330fdc9f95c04ce736022fda

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