Malicious PDF — malware analysis report

Static analysis result for SHA-256 441b1347e8478108…

MALICIOUS

PDF

72.1 KB Created: 2021-03-18 20:06:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f209378be46221a98cf488e38fb01bd6 SHA-1: 39fa762f6fe4b93690417d4dc8c5226673b268b9 SHA-256: 441b1347e847810888e7c1b4823d111a50bf21494d5faa8dad8f38d31326b825
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a link farm, which is a common technique for SEO poisoning and directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lead the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=craft+essence+of+ravage+health+eso PDF link annotation
    • https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/4048407.pdfIn PDF document text
    • https://veralekixa.weebly.com/uploads/1/3/1/0/131069874/2543296.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/58022700197.pdfIn PDF document text
    • http://kolegutoravi.mygamesonline.org/britain_for_learners_of_english_james_o_driscoll.pdfIn PDF document text
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/6091537.pdfIn PDF document text
    • http://xikimubixod.22web.org/mememebulotaxipomuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/8091139258.pdfIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_d03bf6413d2141299a14aa5c6feff2fd.pdf?index=trueIn PDF document text
    • http://mewabetowa.myartsonline.com/xofozigokefe.pdfIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_d95f8db74dc94bb19edd90332ad46a7d.pdf?index=trueIn PDF document text
    • http://jolatuziguxobe.rf.gd/99359938636.pdfIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_036544d82d1d4ce3b4a44ad87cf033fd.pdf?index=trueIn PDF document text
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_8649bc0b86f7475b927092f1135d0d2f.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_e8af39d46dac42eeae711a69498a6bea.pdf?index=trueIn PDF document text
    • http://dejugatifug.rf.gd/71629956741.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_2abcc379b3b847ad89cc77b97d9b7b81.pdf?index=trueIn PDF document text
    • http://sutexuvidag.myartsonline.com/orthographic_drawing_definition.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/89438295503.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/batalogukavaravu.pdfIn PDF document text
    • http://bejuxufuvojofa.rf.gd/check_in_gol_celular_android.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_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 5108 bytes
SHA-256: ab708fc990cd35993c55fe0377224d7bce7c93fe48d440001881ba2e2e4c3864
font_01_sfnt_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 11144 bytes
SHA-256: 232e37b96c28915793a2d16a8327cb64bb30516a0b61e70f32a4e0c480d6d1df