Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d03619af2b3763…

MALICIOUS

PDF

77.3 KB Created: 2021-05-09 09:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9c9327d589b0fed0898282a182aea4d4 SHA-1: edd21c87fbb5af5058ed4b8e4793124bcf3c79b6 SHA-256: 89d03619af2b376325cdd698c16d7a90fb3c86cd1a758c468aa674019cd6a823
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on suspicious domains or use numeric slugs, indicating a link farm or SEO poisoning attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via the embedded URLs. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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 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.
  • 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/strik?utm_term=how+to+hook+up+dish+dvr+to+tv PDF link annotation
    • https://cdn.sqhk.co/dilobowuz/xcibh3G/top_english_songs_of_90_s_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_605b065c80560.pdfIn PDF document text
    • https://cdn.sqhk.co/wofikubid/jjhjxII/xorovuxomofigetivanizara.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hhehbjj/roblox_free_robux_codes_2020_august.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Goge6ib/lean_bulk_workout_plan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474723/normal_5fc7cb1e4c23e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff378b574fac.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/Vibcajb/old_man_s_journey_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_6044825a50b37.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/gusule/29571141016.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/92106859706.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/philips_universal_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/47481879389.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/wiwoxabegidemaxududuwuvow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/248b59b6-4bee-45f0-9f8c-f5eabb4d46a2/17161696036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954e0042-25fc-4be2-bedb-f3cfb5b53c0d/jogezipirini.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_46c5bbf1764948608290aab4743238a5.pdf?index=trueIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_bdcb6df470904ec5a2cd3f0c6300938e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/afsoon_e_jaan_part_2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/why_do_dogs_make_better_pets_than_cats_essay.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_off0000f0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B1 4984 bytes
SHA-256: 6116055c45a79d1b98c74fd2c70a916d25e6d61836cd6ca6a226339c9c806f8a
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 10776 bytes
SHA-256: 5197226aafdc63a200494a824cc7e73f7ff1b7e79aaaa16b95d3434695389d7d

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