Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a07815381787cc2…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 16:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a8a0570c071d417aa1ddc040efb3f838 SHA-1: b19b50ff205176adb41261e0f73cf6dc94b031a6 SHA-256: 4a07815381787cc2fc446cbbfafdc90449942ea53449f215c427922b65275034
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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://midufefew.ru/123?utm_term=visuo+siluroid+manuale+italiano PDF link annotation
    • https://pojalurerisufi.weebly.com/uploads/1/3/4/1/134109142/sedus_bokaresuratawot_jevuxovapoduf_gatofut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493888/normal_5fcad864dd217.pdfIn PDF document text
    • http://ukrdomonis.xyz/89695416535ou9kc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5fdc6091b4274.pdfIn PDF document text
    • https://jumedewumeba.weebly.com/uploads/1/3/4/3/134310957/2983000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383582/normal_605cf6592a800.pdfIn PDF document text
    • http://boldly-grow.com/kumisetusorosumaz9eo9r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5ffcd126bbad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_6010a0b521df7.pdfIn PDF document text
    • http://pusosokus.iblogger.org/mapa_dos_rios_de_angola.pdfIn PDF document text
    • http://aarbuz.space/kesulubimagapilovx7o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_1ad4a34eed70477ea3ca794dbdf57ebd.pdf?index=trueIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_68ea144f51ee4539bdba1dd653ddc1d3.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_6a4143d3916840bca68310be9757a7e7.pdf?index=trueIn PDF document text
    • https://3064a0a7-8496-4b95-be1e-56094aee372f.filesusr.com/ugd/0cf4b9_75079e9d22e742a1a1db9efde05ae8ae.pdf?index=trueIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_c4da93a39606437a8dcf347669dfb991.pdf?index=trueIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_db546fe1f2e5419eb74b295d6492c59f.pdf?index=trueIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_a924cdc9cba14824965dc1ca8bf5d243.pdf?index=trueIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_0d47570bf0bf478fa1f7e2193f8e0899.pdf?index=trueIn PDF document text
    • http://jibipadesubamom.epizy.com/aptoide_apk_latest_version_for_pc_laptop.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_off0000e8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 4936 bytes
SHA-256: 3ae21a57b2d1f0319bf5b498281b7dcf3a1f6f729e1d67e39fd89a449107c2a3
font_01_sfnt_off0000f951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF951 12484 bytes
SHA-256: c62edc800e3447de5810b4b4baa3e6806553acd5c21d42076b944c634cfc2bdf

Open this report in the interactive analyzer, or submit your own file for analysis.