PDF malware analysis — malicious · 7f07f1e33c7b93be

MALICIOUS

PDF

112.8 KB Created: 2021-05-10 07:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22

MD5: ecef2118d60e443a210dc0067f26df18 SHA-1: 864120510c042390f2aecf7b8c2673491b3780a6 SHA-256: 7f07f1e33c7b93be19d292614b77b89cd47fd3c95651bd951d3cdff41f25663c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL, 'https://leonvi.ru/strik?utm_term=cuales+son+las+8+inteligencias+multiples+pdf', suggests a phishing or SEO manipulation attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', reinforcing the malicious classification. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://leonvi.ru/strik?utm_term=cuales+son+las+8+inteligencias+multiples+pdf PDF link annotation
- https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/2283827.pdfIn PDF document text
- https://cdn.sqhk.co/rurewemanavi/ggn9Ygg/bootloader_samsung_ace_3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4505771/normal_600b929f9b531.pdfIn PDF document text
- https://cdn.sqhk.co/lizasizova/i6iheia/mufafefubonunesis.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4470961/normal_5fe18bf052866.pdfIn PDF document text
- http://tonilakifak.mypressonline.com/exercicios_de_analise_combinatoria_resolvidos.pdfIn PDF document text
- https://lafasajuju.weebly.com/uploads/1/3/4/0/134017903/fewafapim_weduvopip.pdfIn PDF document text
- https://cdn.sqhk.co/menodotitit/jdnjcgi/nafugumugoza.pdfIn PDF document text
- https://cdn.sqhk.co/zetewexuve/Chijdy0/performance_appraisal_hrm.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369504/normal_605cb74e963e9.pdfIn PDF document text
- https://cdn.sqhk.co/lowanivari/jdii0id/buzes.pdfIn PDF document text
- https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/sumasogu-pobodujebutu.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4416939/normal_6008419f1a605.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.opentle.orgIn PDF document text
- https://uploads.strikinglycdn.com/files/fc3a0598-ad8e-43b6-8be2-04ea72de7109/rewez.pdfIn PDF document text
- https://s3.amazonaws.com/wefemabeni/sandf_bursary_application_forms_2019.pdfIn PDF document text
- https://s3.amazonaws.com/xunilukegez/what_is_group_model_in_public_policy.pdfIn PDF document text
- https://s3.amazonaws.com/xixonu/naval_warfare_pc_games_free.pdfIn PDF document text
- https://s3.amazonaws.com/jinotugiwomo/slide_presentation_maker_free.pdfIn PDF document text
- http://radiviwix.onlinewebshop.net/xakovigenat.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cb48d961-08ba-485b-9d3f-c53aef3a01da/drawing_classes_for_adults_in_kolkata.pdfIn PDF document text
- https://s3.amazonaws.com/rekawexuretowo/66313766176.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
- http://www.gnu.org/licenses/gpl.htmlIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014f87.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14F87	5476 bytes
SHA-256: `dff1dd94b6d8f1ed9878e68aab69613e563273a7e01e631af22154b6c99045eb`
`font_01_sfnt_off0001620b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1620B	6068 bytes
SHA-256: `d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd`
`font_02_sfnt_off000171bc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x171BC	13728 bytes
SHA-256: `5d5813edee15c2662b0b1d7fe01c6a9b48cb74dcef944470a68a56c767ce441f`
`font_03_sfnt_off00019dec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19DEC	16252 bytes
SHA-256: `a2478705ccb47f37b7ffaf62b3ccac9ba1aff1dfa551471dd56f0e8bb1e649bc`

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