Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edd06fe427df9df…

MALICIOUS

PDF

82.3 KB Created: 2021-03-18 05:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e452c4a8202d811e701385178ef8cf3e SHA-1: 58f3b1077b93f6204ab37fe5a847449a5838164e SHA-256: 5edd06fe427df9df138bc6213594632c8ea03387b2739baecd06e0d66a6332c5
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' and a 'PDF_SEO_UTM_REDIRECTOR_LINK' pointing to 'https://golowaki.ru/123?utm_term=information+about+my+car+by+reg'. The document body, though heavily obfuscated, suggests a lure related to car information, aligning with phishing tactics.

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.
  • 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.
  • 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://golowaki.ru/123?utm_term=information+about+my+car+by+reg PDF link annotation
    • http://mezapadanufelon.iblogger.org/7229431854.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/mixazirusaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zobovobewuw.epizy.com/ssf2_0._9_b.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_65728c6b6b0b4a4da8cb30b61f943545.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ragejufa/clavier_espagnol_android.pdfIn PDF document text
    • http://jokosalona.epizy.com/see_aggression_do_aggression_results.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/647009121.pdfIn PDF document text
    • https://74bb8966-1fc2-43cb-a641-24c20f380d28.filesusr.com/ugd/84c7b5_ef2d228cd70c4dd1b96fe934d5476226.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwara/wigoximaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/45212513000.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/51404098372.pdfIn PDF document text
    • http://kogivibavir.epizy.com/hayek_law_legislation_and_liberty_summary.pdfIn PDF document text
    • http://xeravujowa.epizy.com/tolofufadifolegin.pdfIn PDF document text
    • http://napamewa.atwebpages.com/66509284712.pdfIn PDF document text
    • http://tepominofujemo.atwebpages.com/wurujusa.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_8dfd2f8c57074a50954a20fc54d1c179.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_934d20797a1c4dee87ce53af748866b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dorulusof/goxas.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/buku_aristoteles_politik.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/live_football_streaming_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/lesidovotositak.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_off00010438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10438 5172 bytes
SHA-256: 0fc00579c85e16fd5127c6dbb4b8b3ccaabb3a212e03d4271106dee14c2d612c
font_01_sfnt_off000115c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 11188 bytes
SHA-256: e51791f0bbaf5fc05c6f5ac142e902fd2946414f54251e7e323bbcbee3162d03

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