Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9162f9b72acc11…

MALICIOUS

PDF

36.7 KB Created: 2020-10-29 05:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 76eb01162a2f5a4423ab8baaf2212c2e SHA-1: d63bfe3c300f628e23b60802a2d56870b033be83 SHA-256: 6e9162f9b72acc111087bda9b35af5dc43179d7672492f3d317fe37a51608f5b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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.
  • 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/strik?keyword=double+agent+apk+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f8a5e516b9c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87aad0add6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_5f8aabbae6778.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8974616b731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f92676a29ecd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_5f977f6648648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411701/normal_5f98dbd83a735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f95eeb931a2d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6249/2324/files/android_manifest_orientation_landscape.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/nafekoradexifolujed.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/couch_to_5k_nhs.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/centrales_termicas_pedro_fernandez_diez.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/tunetaropolakozuloden.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/what_do_elephants_eat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2624/9377/files/66282073835.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/adobe_reader_for_windows_10_free.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/difference_between_c_and_c_download.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000045f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45F1 3208 bytes
SHA-256: cba1843f09f856c998ae8919c4d1e33559e8760153bd0d62269df377c67fc41a
font_01_sfnt_off00005161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 5148 bytes
SHA-256: 7f8e8c9e57f4f600c20c1a14ec894d956f84c5f24d6dfef28870d3358acd0b26
font_02_sfnt_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 10048 bytes
SHA-256: edc4d74682e98416f6e842dd15e0d0607567014bd81a32d8668e561c25573e9a

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