Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d632eeb784db34a…

MALICIOUS

PDF

76.0 KB Created: 2021-03-24 04:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6c9dec41c535458507cf9089c2519180 SHA-1: c9658a741c7dd24ecef9a4cb2bdcf1cd4a2630a6 SHA-256: 8d632eeb784db34ae2d9c111b13bb553670dc9c6bf372d463e9d47226f5c1fc2
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which point to unknown or potentially malicious domains, suggesting a link farm or phishing attempt. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://mezovuduw.ru/123?utm_term=aarum+kaanathe+song++320kbps PDF link annotation
    • http://markettop.pro/chemical_bonds_and_reactions_worksheete5ska.pdfIn PDF document text
    • http://trysoda.pro/tafalikemanubifadux8rlb2.pdfIn PDF document text
    • http://xusatekekosigi.iblogger.org/hillsong_worship_songs_mix.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/bipoxuzupivi_zizeloxefud_zosupakililixap.pdfIn PDF document text
    • https://wuneregogituweg.weebly.com/uploads/1/3/4/6/134686440/5599721.pdfIn PDF document text
    • http://golden-charm.ru/graco_snugride_click_connect_35_lxkca09.pdfIn PDF document text
    • https://gilurumujeluzem.weebly.com/uploads/1/3/1/8/131857598/wogefo-pimopo-vegige-bukipawu.pdfIn PDF document text
    • http://vonezejavej.22web.org/53412432717.pdfIn PDF document text
    • http://sobakin.space/amsterdam_centraal_platforms77icd.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/kofelinawijitapuwid.pdfIn PDF document text
    • https://sulunekuzesafap.weebly.com/uploads/1/3/1/4/131406846/a62f057db337e.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/midizaxopazeji/awdhesh_premi_ke_gana_bhojpuri_dj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b8dda4-0696-4b5c-9725-7f9932d037ad/pll_skip_algorithms.pdfIn PDF document text
    • http://borinalujid.epizy.com/carbon_copy_forms_custom.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/bacteria_and_viruses_worksheet_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1069c5c-6a57-4c37-af9f-20c65bfac496/the_importance_of_being_earnest_2002_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd2ceac3-a321-4609-aa49-aae0db2f6f26/how_many_carbs_in_arbys_red_ranch_sauce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/effb5950-339c-4c83-af0c-0e0c001cde85/95891447459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e737552-aeb9-4733-83f8-61b48616c59b/honda_generator_customer_care_toll_free_no.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/fewomomepo.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/negative_prefixes_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/wallpaper_photo_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/cashier_job_application_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/23620818952.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_off0000e915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE915 5832 bytes
SHA-256: 384f7f1a05e12065a0ee1ebf3fc1554566d367cf0088ff1ab46b5c06b5496828
font_01_sfnt_off0000fcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 11148 bytes
SHA-256: 272d3f9e96ba42228d311ffd268f23da801e9aa8b048c1e9291f9a6adeef69ee

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