Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25d8eddaec59519…

MALICIOUS

PDF

65.6 KB Created: 2021-03-25 09:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6ad551d450322261463bb1c6816bb5f6 SHA-1: 50e5d4f2deef953d627ffa58348afd6e60597356 SHA-256: d25d8eddaec59519d6996f39d6c793bd0a6db5e5e68dab89a49eded441f353c1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://baarspo.ru/wix?keyword=hp+envy+700+pc+series+specs PDF link annotation
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/f98b15ad5.pdfIn PDF document text
    • http://numupizor.22web.org/how_to_win_pick_3_lottery_books.pdfIn PDF document text
    • https://wulodegekejiwa.weebly.com/uploads/1/3/4/2/134266030/9478331.pdfIn PDF document text
    • http://mihetos.xyz/solar_system_worksheets_answer_keyy9h0l.pdfIn PDF document text
    • https://roxupexuwukobeb.weebly.com/uploads/1/3/4/7/134749027/07fb62a9b81f.pdfIn PDF document text
    • http://afracheat9.xyz/how_many_chapters_in_fnaf_the_silver_eyes42c19.pdfIn PDF document text
    • https://pixufudevolu.weebly.com/uploads/1/3/0/8/130814466/7557878.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/y1g2gcv/tanks_in_ww1_advantages_and_disadvantages.pdfIn PDF document text
    • http://stepka2016.xyz/shakespeare_how_many_plays_sonnets_and_poemsyumc8.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwesedujila/iicHRia/aerox_155_top_speed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://09235f31-469a-4613-94fc-36d04c1f642a.filesusr.com/ugd/8b6407_192c850559dc4849bc59e44adc44f9c7.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_450b73b29b584576a5b7e8e585338d94.pdf?index=trueIn PDF document text
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_005a479a33414bfc8ce6f52d181a3f49.pdf?index=trueIn PDF document text
    • http://safinemawexow.epizy.com/pifokipi.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_off0000c48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC48B 5032 bytes
SHA-256: 7e59c7c6d65160bffdef45fb79e98d20ea16552a8c7ea40f4599f1da0258653d
font_01_sfnt_off0000d5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CD 10368 bytes
SHA-256: 1808cad9ce8263f119c8570e3b3f8b5554ad36fd3263a40df034141bb0923b23

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