Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0e3409cf688c3b…

MALICIOUS

PDF

77.5 KB Created: 2021-03-17 04:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f9770efded1ec30e645d4f4f1db9e7ff SHA-1: 68079a0edd223a9e97fc89cdec90035b32d5b108 SHA-256: 9e0e3409cf688c3b8ee6cf3136171efdd82d959474c14f9e267f8a33ed8cfa12
244 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to known malicious redirectors and disposable hosting, indicating a link farm designed to distribute malware or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=maytag+centennial+gas+dryer+owners+manual In PDF document text
    • https://cdn.sqhk.co/xavonepez/ijThafW/ant_art_tycoon_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482847/normal_604aa8b8f143b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466175/normal_60256d18a5149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_6014c77f8bf0d.pdfIn PDF document text
    • http://my-favshop.online/how_to_install_xfinity_wireless_cable_boxz8czq.pdfIn PDF document text
    • http://wekeb.space/how_to_improve_grip_strength_for_rock_climbinghq7rn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_602e6f56c5f94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387577/normal_5ff69153b9966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_5fd829f749114.pdfIn PDF document text
    • http://firstdoctor.xyz/old_muscle_cars_for_sale_under_5_000_australiavk155.pdfIn PDF document text
    • http://mylic.ru/cisco_catalyst_2960x-_48td-_l_datasheetvqfw7.pdfIn PDF document text
    • https://tebideronapiza.weebly.com/uploads/1/3/1/4/131483209/3269e8fc95e255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_6028e225288a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_600187505d57f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_604aba0d01ef2.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/ieP03ic/59829836238.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_5fe6e77089331.pdfIn PDF document text
    • https://cdn.sqhk.co/gepeduvo/PijdhbQ/pokemon_go_friendship_level_reset.pdfIn PDF document text
    • https://zevakevo.weebly.com/uploads/1/3/5/4/135400716/5869112.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/468c6461-2ad0-4ee6-ac92-07dc21484c46/alesis_dm10_snare_problem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370d2c7e-56b3-4dc9-ab74-c98593fb0805/how_to_learn_stock_market_trading_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f110f82-ffaf-40f7-9254-cdcfa6dd3c12/the_book_of_birthdays_astrology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066bb558-e18c-4d28-86f4-60f36b22ce3a/how_to_learn_korean_alphabet_easily.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b99ae1-d199-46bd-8bde-f7929009897e/99576653124.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_off0000f0bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BB 5460 bytes
SHA-256: 42da35ad36856b7a7c2ab00f9e976c25ec284c0d0d261846d1a54141a9bd5fc5
font_01_sfnt_off0001035e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035E 10852 bytes
SHA-256: 50736743b391e0db894bee645f8d7195b6ab6f54ad082f365a3dd5552ce9eb2b