Malicious PDF — malware analysis report

Static analysis result for SHA-256 f296c58419082349…

MALICIOUS

PDF

77.9 KB Created: 2021-03-30 16:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d7a3dc8b28a7772b7e93894ec5b55a19 SHA-1: ad9aa76a3fd4877af11cc0661a3d118487211935 SHA-256: f296c58419082349ee5cfb45cef5718a793e863438bad32ebda229f5dbe519bd
186 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external websites, including suspicious domains like 'seumenha.ru' and 'mavafesumej.medianewsonline.com'. The document's content, disguised as a school supply list, is a common lure for phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=everitt+middle+school+supply+list PDF link annotation
    • http://mavafesumej.medianewsonline.com/pdf_files_download_as_aspx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446382/normal_604b0536cc9db.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/how_to_break_marital_delay.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/zenepififoduxamadudol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456114/normal_603a17008cec1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvamawijivef.atwebpages.com/company_introduction_presentation.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_fcd99677832c493db0ca755d7817b297.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_fe2309cec5cf4a82b77330dd3450a438.pdf?index=trueIn PDF document text
    • https://aaf2f8d8-4593-4070-95c3-ed2308805076.filesusr.com/ugd/337eea_c511ba1e41ae46b2891af359c7d89817.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/guxisopiro.pdfIn PDF document text
    • http://xuwozir.rf.gd/ecological_succession_webquest.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/35227884296.pdfIn PDF document text
    • https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_5ac35d69f4b54322b2bbfd2fafc800da.pdf?index=trueIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_8eb000ed03524bf59a9f8ff69b46935f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/woromadiwivuf.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_bf4ad7276fce4e5996e18ad70a4b517c.pdf?index=trueIn PDF document text
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_097263c1705f4dd2b13b667c41e1087d.pdf?index=trueIn PDF document text
    • http://tivexedasabuxi.myartsonline.com/13687095442.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_off0000f286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 5224 bytes
SHA-256: 2f9c85a4b9af5a874ab99a1b017eea1a8a37729f1dff04e1381363bccd420133
font_01_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 11280 bytes
SHA-256: e2848c2f0de2660534fb77668d85a61b9d472ff3cc068cd31c82e8f745964f06

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