Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5af0700870667c…

MALICIOUS

PDF

78.8 KB Created: 2021-04-03 15:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8fde6d4852f1615690e00e8d57cc4d9f SHA-1: 6373d5e50a5061ed45ec78fca829ab043390cfca SHA-256: aa5af0700870667c6e4337faa14b6b12c0a6dcefaf204be717ce341ca63adf37
186 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, indicating a phishing or scam attempt. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary external URI, 'https://nipisod.ru/strik?utm_term=how+to+deal+with+a+stressful+life', is likely part of this redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • 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://nipisod.ru/strik?utm_term=how+to+deal+with+a+stressful+life PDF link annotation
    • http://alkim.xyz/56182205771clkjb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447888/normal_605f9fda9a7a8.pdfIn PDF document text
    • http://natur-bio.space/kung_fu_panda_3_trailer_reaction_mashuppbrxh.pdfIn PDF document text
    • http://aov.one/apostrophes_worksheet_for_grade_4d3faw.pdfIn PDF document text
    • http://golden-charm.ru/wepubonuz73dq9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501029/normal_6020a30e6f0b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383798/normal_600060333335e.pdfIn PDF document text
    • http://heliusdesign.ru/lofakirajugobfn6z.pdfIn PDF document text
    • http://sparzha.club/sanyo_tv_universal_remote_codes_4_digitnkd6y.pdfIn PDF document text
    • http://mavito.online/wheel_of_time_book_1_audiobookew5gi.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/9695466337680m9n.pdfIn PDF document text
    • http://natur-bio.space/33810753366gmtl7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_4d4c12544697412199b18255f1bd6d43.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b31ab2f-64dc-4e6c-95d2-c46a2e7feeb7/lonaxo.pdfIn PDF document text
    • https://108bb973-5399-4bf7-a70e-a18780752cac.filesusr.com/ugd/760a88_34972daf269a413a86a694cb17d6323f.pdf?index=trueIn PDF document text
    • https://000bb656-a8cb-4e8b-9327-0b0ec99f56fe.filesusr.com/ugd/3f812e_3f6583b32c024a35bc72cdcde1c6e7a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22395296-5027-4f32-bcc8-bac217c822e2/gagotowunixowalef.pdfIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_42fe95d9b61d47f68489e1f35ff4324b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/366f4e89-0fe6-486a-8f60-fd8238c0e9f2/how_to_put_a_brother_printer_back_online.pdfIn PDF document text
    • https://761e60ea-5e0e-4c43-b4c2-f6a9045c608d.filesusr.com/ugd/545033_875a61eb9ebc4a669e2090bcf2d6bac6.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_9b291b88414f40b0b3a726ec06b17ebe.pdf?index=trueIn PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_d9732ec84048468789be3647300b5466.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_e25ae2bb87f243e3adfec8ac40126215.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0032b50a-0677-46f2-a599-781cd035a6e7/gibebobofiwevesisasafis.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_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 5048 bytes
SHA-256: 7928cf7a3879db1a1f3eddf378c20d9bd929a26bc67268245595c14f45195715
font_01_sfnt_off0001080c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080C 11128 bytes
SHA-256: 860ede6f7616ac41790b8b48d0ec561264723ab938f5bd55bbf40411facaa9a2

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