Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dd64ea2334764b…

MALICIOUS

PDF

92.3 KB Created: 2021-04-01 16:50:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f19b59952e49628e9ad773fd2596e227 SHA-1: cb90f3945c6e834b015305cf6f7b14f4e3b90fea SHA-256: 47dd64ea2334764b9af7b7c4ca49938fb4f1521ae1cbe622a4c71499dd003e28
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 pointing to SEO-optimized content farms, a common tactic for distributing malicious files or conducting phishing. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a deliberate effort to create a link farm for SEO purposes, likely to disguise malicious redirects. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary goal appearing to be directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/award?keyword=los+adjetivos+en+ingles+pdf PDF link annotation
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/ea7c9f4a.pdfIn PDF document text
    • https://jedagafigi.weebly.com/uploads/1/3/1/4/131438055/sovidimevu.pdfIn PDF document text
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/9122828.pdfIn PDF document text
    • https://cdn.sqhk.co/sowumavag/gh7BcaB/18365780129.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/SiadBja/bullet_time_fighting_2.pdfIn PDF document text
    • https://wejapofi.weebly.com/uploads/1/3/4/5/134590092/b7e1c8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wizuluworafid/what_are_the_main_characteristics_of_realism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b03f17-0b46-4fe8-b880-b98163ce8f5f/57646098528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb452de-c968-46f3-ad7f-e5e5a1da5b11/vitibek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87514413-622a-4c06-beb4-b47478cc5709/95750966848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01209805-77b1-4379-8043-6cb988ecb184/36813487906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07800dba-fd9c-4b5f-8b65-91dd243151ac/how_to_build_lipo_battery_packs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c2b4c53-5906-41c5-8571-94f11d686b9c/owen_meany_chapter_3_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cae948a1-9b8f-4476-b99b-f3f0a19e8d1e/96246187884.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d986ad6-c3b0-431b-93cf-2e933c0bc1a4/2039830995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8b29550-8f1e-4d21-94ed-0f26c89d2835/duvalidobome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0c86aa1-cc25-4096-a375-96ea0dec7401/xibolururebujokul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9e5175-3cc4-4d20-9f0f-327dd382baf1/how_to_set_time_on_citizen_eco_drive_chronograph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/401f08e1-9653-4ff7-ac2b-385bee0a41a8/practice_scientific_method_biology_basics_unit_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/emacs_helm_cheat_sheet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001056a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056A 4976 bytes
SHA-256: e87b9a51c1b63d1201c416cec76500dd169d725de891c373525215849ccafe34
font_01_sfnt_off0001167c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167C 12256 bytes
SHA-256: 1bcb42eab615aaa4c17fedb2a3887de0df6d44cec4ecd75a15a04f36c64ea09a
font_02_sfnt_off00013e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off000153c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153C9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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