Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a63153510a36c09…

MALICIOUS

PDF

77.5 KB Created: 2021-02-28 05:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 52f873dca9510b4dfb7ce75226b916da SHA-1: 94d1c4ab87e95e6e6735a705ebba8156afd3133e SHA-256: 7a63153510a36c09664dd8fb8b5016ebe4afe0e72c0aa9400576df555f59a780
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files hosted on various platforms, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure. The presence of numerous external links suggests an attempt to manipulate search engine results or distribute malicious content disguised as legitimate documents. No scripts were extracted, but the PDF structure itself facilitates the malicious linking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/strik?utm_term=2002+buick+rendezvous+service+engine+soon+light In PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/269870.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/guitar_gospel_songs_with_chords_and_lyrics.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/pisowes.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/lelumukuloseraxo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc9447626eb2.pdfIn PDF document text
    • http://morasuxod.getenjoyment.net/88930506481.pdfIn PDF document text
    • https://jowanubeso.weebly.com/uploads/1/3/5/3/135399775/wikipimekuduf.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/jmtUigN/brothers_in_arms_3_game_download.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/fifty_shades_freed_movie_where_to_watch.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/3ca86d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_600cb3ea1f441.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/xajowu/monthly_business_expense_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/3457631579.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/ciclo_de_krebs_pasos.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/runokenomit.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/gemunad.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/nukowujat.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/2611302167.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 2900 bytes
SHA-256: 10a07fc969e6c8cf41398fcfefa625e426b29a45b33f3716d0886db1405c0d2a
font_01_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 5484 bytes
SHA-256: 14c77af8707f3798209c6fa73d268fb5550313522e0182d448e467c0eac181be
font_02_sfnt_off000103b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B6 10720 bytes
SHA-256: 09888d97ce4b5c3d66cdd15533b52de0cb0bca69cf33965e9e8c8a1c7aaf8259

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