Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e8a1922b2400d5…

MALICIOUS

PDF

89.2 KB Created: 2021-03-17 21:23:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c5c02b98e667c39b23e966deb5e3ccc3 SHA-1: c861132867cc95e53d866ff6aa8925370325e3b3 SHA-256: 52e8a1922b2400d571bf087e09f89ee17df8b34dd0cff518f153b5514db457d3
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification strongly indicates malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'Fagor ad-48w manual', suggesting a phishing or malware distribution attempt.

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://pelibifir.ru/wix?keyword=fagor+ad-48w+manual PDF link annotation
    • http://tepugorotewole.medianewsonline.com/the_possibility_of_evil_audio.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/dktMih6/rebidaxakajawepazu.pdfIn PDF document text
    • http://lorozetuwivu.medianewsonline.com/zip_codes_by_county_ohio.pdfIn PDF document text
    • https://jometulezut.weebly.com/uploads/1/3/4/8/134869356/4e3f399f.pdfIn PDF document text
    • http://probmaka.tech/how_much_fits_in_a_carry_on_bag1v7fe.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/hchm3vn/idle_gold_gem_clicker.pdfIn PDF document text
    • http://bumufirila.mygamesonline.org/gixaxumimudagevof.pdfIn PDF document text
    • http://monoga.space/minecraft_bedrock_edition_for_windows_7cb9nj.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/bja8Xjc/freeciv_scenarios_download.pdfIn PDF document text
    • https://dinabowufijub.weebly.com/uploads/1/3/4/7/134751612/5348000.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/novipaliwid/metronome_app_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/bedingte_formatierung_excel_wert_anderer_zelle.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/xatevalad.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/59075326164.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/56279700026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9c93ff-744c-4867-9eba-595d732bc8f6/how_much_does_it_cost_to_maintain_a_camaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a71162-b2fd-43a0-a0bf-6c8c0c30c7b2/jubarej.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 5328 bytes
SHA-256: 12465b2d9c688380df9144634504fe3bf82bc30b5c51a634ea9ec2e8837e6740
font_01_sfnt_off00011748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11748 12472 bytes
SHA-256: b8674728456247caa3916d6dd73949f17ca526013bd46a1e2b0ac89b473ff3fa
font_02_sfnt_off000141a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A5 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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