Malicious PDF — malware analysis report

Static analysis result for SHA-256 356a061bc75e29e0…

MALICIOUS

PDF

40.7 KB Created: 2020-11-02 17:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 329ccbd2c2e7026fc20b21dd950763a5 SHA-1: b92c2d875910e90fe6105610feed85b56cd1f83a SHA-256: 356a061bc75e29e0f1c778acadaaa1443872a0d4513159845355482d28bbfc70
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically identified as a redirector and an SEO link farm. The document body, though obfuscated, contains text related to 'City of west allis property tax search' and a URL, indicating a lure for users to click on malicious links. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=city+of+west+allis+property+tax+search In PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/9686180.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/deriginop-fagolukizi.pdfIn PDF document text
    • https://fineruliji.weebly.com/uploads/1/3/4/3/134313455/17e99903b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_5f98624304ed7.pdfIn PDF document text
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/f87b9208ef09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/sewawisowubasegikupa.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/remamopodejotili.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/cersei_lannister_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/install_apk_via_adb_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/assembly_chart_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/toyota_automatic_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/jewezota.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_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5272 bytes
SHA-256: 28ac4b4edcb345ca9aa455151157e9c7ef4bcdaeb84410cfa0f6b36a50aa196b
font_01_sfnt_off0000739d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739D 10136 bytes
SHA-256: ad89cd985aa40c4bd2ef4dea8607ffcbea8471504b059e004fe2335717bd6a57

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