Malicious PDF — malware analysis report

Static analysis result for SHA-256 326f8503ed5c64a9…

MALICIOUS

PDF

43.4 KB Created: 2020-10-25 18:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e15c6a67f31d16299c3e637d4fd2fc69 SHA-1: 14fbd802627a687a86282bcbed2a4f4379f90800 SHA-256: 326f8503ed5c64a9a8452360d52f4bcfb120f19dd2d593067331acfaf28aa9e7
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/6023182.pdf.
  • 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://ggtraff.ru/aws?keyword=administrative+aide+duties+and+responsibilities+pdf In PDF document text
    • https://tekegalesi.weebly.com/uploads/1/3/0/7/130740489/6023182.pdfIn PDF document text
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/buzunovarubiperoxe.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/junagob-susifavoniniza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f8ce41d7ca7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9377c3b7bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f8cb90e3624d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_5f91c95ee3c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_5f8a2c8ddf82b.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/b9ae82fc-f270-478d-ac07-3c4ce3de38cb/74399103464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fb648a-6773-485d-831e-5c885f6b85ce/7710295157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bb8771-d67f-44c6-96ea-c9fe1d8bd326/55261476685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a8d1e1a-cbc4-49d8-96db-b3f5035ceec9/xasosunamaranogufujez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c73d343-4418-4bc2-8291-f362f182f69c/novo_catalogo_hinode_ciclo_2_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2f8431e-7cf3-4d42-8f6e-9505dc5a9f94/zupaduzolizelenelavukag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0249f3f9-e538-4445-8cf1-cc84f964a6a5/83940871412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0852a8c-ecdf-49a7-b81a-632cb02298c1/pojogomumoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8714/4109/files/literasi_di_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5104/1447/files/borderlands_pre_sequel_legendary_weapon_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/3152/7075/files/tudojuxabatesozazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/cours_sur_la_nomenclature_des_alcanes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/27641443457.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_off00006af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF9 5376 bytes
SHA-256: 306277dabe402ca589a0398a27b0f2977f44422f4f16333620e9e496629cf6e9
font_01_sfnt_off00007d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 10440 bytes
SHA-256: 1ff71ea38a226f8f5a7e5637115a6fca183d3e6299cc7d5bdf9514bdb2c6a705