Malicious PDF — malware analysis report

Static analysis result for SHA-256 82895c18b0511017…

MALICIOUS

PDF

99.3 KB Created: 2021-05-18 19:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ab3b774968665ac8cdc13e974ed9459a SHA-1: 8fa1b7db6ded9fc54dac23d71378b28719ad2ee2 SHA-256: 82895c18b05110171db70bbeac578b55a405b4a39988344036ebb2d6fe9ced30
126 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous external URIs and the PDF structure itself are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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://jumiwimov.ru/strik?utm_term=what+are+the+five+beliefs+of+christianity PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372983/normal_60089ae1c4a38.pdfIn PDF document text
    • https://gisonegeviwobi.weebly.com/uploads/1/3/1/3/131383673/971d9ab6a.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/1004059.pdfIn PDF document text
    • https://wironutoti.weebly.com/uploads/1/3/0/7/130739747/2893558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_6003d467b1726.pdfIn PDF document text
    • https://noderewowiful.weebly.com/uploads/1/3/4/5/134596184/dba62fcc3cae7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455669/normal_600c9ec01caf5.pdfIn PDF document text
    • https://rudadikisoma.weebly.com/uploads/1/3/1/6/131606677/jepupevopar_dumuzi_digop_zawizalineti.pdfIn PDF document text
    • https://niniteju.weebly.com/uploads/1/3/0/8/130814631/5f8bb050.pdfIn PDF document text
    • https://musonilemif.weebly.com/uploads/1/3/4/7/134752032/tumukodaxokoku-jumanima.pdfIn PDF document text
    • https://livesagu.weebly.com/uploads/1/3/1/4/131437401/7610748.pdfIn PDF document text
    • https://molobaguzali.weebly.com/uploads/1/3/0/7/130739923/gevujoropenuvapuloxi.pdfIn PDF document text
    • https://bogezemobazuv.weebly.com/uploads/1/3/1/8/131856224/biruva_tiropot_suzoripe_rikamixe.pdfIn PDF document text
    • https://waripeseditalas.weebly.com/uploads/1/3/4/0/134012866/zamexif.pdfIn PDF document text
    • https://gipofomodofomew.weebly.com/uploads/1/3/2/3/132303323/3d8f448ff4680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_5fe7904298897.pdfIn PDF document text
    • http://gikonifip.22web.org/nordictrack_elite_4200_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413587/normal_600c8a90cad54.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/b894a6c149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4d8308-9835-4400-849d-9d5c0c497c21/practice_theoretical_and_experimental_probability_worksheet.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/brothers_grimm_stories.pdfIn PDF document text
    • http://gewagopixinilu.rf.gd/dinowiza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a627e35a-3e31-4817-b30a-957e63de9388/sanavulinipixizibekofex.pdfIn PDF document text
    • http://donarup.rf.gd/botany_morphology_of_flowering_plants_questions_and_answers.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA3 6416 bytes
SHA-256: 9e91590ae502ff902ba306624a00c8d44396a7ee9717b1bfa1717db63fe08483
font_01_sfnt_off00010c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C76 5284 bytes
SHA-256: 1d5352e1b00fd2928c7d17c3a23c3676aafb6466bb9c5864147f0b23a65f896d
font_02_sfnt_off00011e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 8600 bytes
SHA-256: bf6d71c88c1ebbb12987994e83427623cfb9cea207a68bb478346a6db20c59ab
font_03_sfnt_off00013a46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A46 11284 bytes
SHA-256: 83e8c835e9c1fcfbb16017fa15fccdce79670b4131a06b24f0e5afa357bf468c
font_04_sfnt_off00016111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16111 16256 bytes
SHA-256: 0c28d55d9957e5be45f9d3302843a1d8772fc4e8a9a81ea04eed1b5cc2016f23
font_05_sfnt_off0001766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766E 1736 bytes
SHA-256: 5095ccdfdd328c3f25b1766e9c65bca58fa839170fcb9f3db3c20e130d955aff

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