Malicious PDF — malware analysis report

Static analysis result for SHA-256 584fd4b4a7ba7925…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 13:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e549bd04093e91ff80b62f9a69bc21ef SHA-1: 1b3017cf543fb67be25e5ebe11e260917307b057 SHA-256: 584fd4b4a7ba7925833cabbf99cc1c1f4f149f242bde25db0db7cb29636a6a1e
126 Risk Score

Malware Insights

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

The file is a PDF that contains an external URI pointing to a suspicious domain, identified by heuristics as a potential link farm and flagged by ML and ClamAV as malicious. The PDF structure and embedded content suggest it is designed to trick users into visiting the linked URL, which is a common tactic for phishing or delivering further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=aerobic+and+anaerobic+glycolysis+pdf PDF link annotation
    • http://firolinulaka.22web.org/97911645250.pdfIn PDF document text
    • http://retilokufiz.22web.org/pobugidolibo.pdfIn PDF document text
    • http://tumerasiwabuzip.22web.org/62712167910.pdfIn PDF document text
    • http://tolebexeju.22web.org/apostila_auriculoterapia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_79998024a3ff4364b893e510ccf37657.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/expendables_3_parents_guide.pdfIn PDF document text
    • http://numivonef.rf.gd/82127713724.pdfIn PDF document text
    • http://vitixageseda.rf.gd/aladdin_1992_movie_songs.pdfIn PDF document text
    • http://fojinejadasetax.epizy.com/ny_giants_news_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/67815866165.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/bapivarorifegesafitamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa078559-f6af-4924-afa8-6d8ac3961833/how_to_fix_samsung_refrigerator_error_code_22e.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_7f50dc0a46254fbb8546c0e54ab69525.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tenunud/mixogenimum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6799436-1068-4261-8382-03e681135c8c/50529540896.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/genie_pro_max_universal_remote.pdfIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_b4b78556ad5e475fb8d6ee1025d37de3.pdf?index=trueIn PDF document text
    • http://jijawidifopaw.epizy.com/91041553875.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5482bc57-357e-46b6-9a9f-c16bfb8efdf7/zexizexinipibajufitiwe.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_5208ead09cd84ff788175faf55991694.pdf?index=trueIn PDF document text
    • http://tavupikegoseri.epizy.com/gukarugudoxiguguja.pdfIn PDF document text
    • http://rolexewosuvasu.epizy.com/mamaferorikam.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_6cd177ea158f42928d104438a3b6558e.pdf?index=trueIn 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_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 5552 bytes
SHA-256: 954ba42ff7bdea27e8f6e571f344b6a4878e759bb5420b338d85821dad9f9c00
font_01_sfnt_off0001141c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141C 11072 bytes
SHA-256: 8858e7dcc61fa66c20827aeea1bf43e66306dda1c8443a97d3fd4fc343a90deb

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